Entries |
Document | Title | Date |
20080198072 | Systems and methods for positioning using multipath signals - A signal processing technique for RF active, passive, or aided localization approaches that utilizes multipath signals as additional measurements with a filter or estimator, e.g., a nonlinear filter. The filter uses indirect and direct path measurements or any other available signals to build parametric models of observable indirect paths. If one or more direct path measurements are subsequently lost (e.g., due to obstruction), the filter maintains an estimate of the position of the person or object of interest using indirect path measurements. | 08-21-2008 |
20080204321 | Method and system for estimating the location of a wireless terminal from a received signal strength - A first estimated location of a target terminal to be estimated in its location is obtained based on information derived from radio signals for location estimation and also locations of anchor terminals. Then, on the basis of the first estimated location thus obtained, estimated distances are calculated while expected values are calculated based on information required for location estimation to compare the estimated distances with the expected-values. Depending on the comparison result, one or more anchor terminals are selected as nonuse terminals. On the basis of information required for location estimation derived from radio signals sent by the anchor terminals other than the selected nonuse terminals and also on the locations of the anchor terminals except the nonuse terminals, a second estimated location of the target terminal is obtained. | 08-28-2008 |
20080238776 | MICROWAVE POSITION SENSING FOR A TURBO MACHINE - A microwave position sensing system includes a plurality of target components that each move between multiple positions. A microwave generator produces a microwave frequency signal. A divider receives the microwave frequency signal and splits the microwave frequency signal into a plurality of position sensing signals. The position sensing signals are respectively sent to the plurality of target components to determine a position of each of the target components. Each position sensing signal may also be calibrated. In one example, first and second frequencies are transmitted through a common wave guide. The first frequency is reflected prior to reaching the target component to produce a calibration signal. The second signal, which is used to detect the position of the target component, is calibrated using the first frequency. | 10-02-2008 |
20080252527 | Method and apparatus for acquiring local position and overlaying information - A method and system for determining relative position information among at least a subset of a plurality of devices and objects is disclosed. The relative position information is based on at least one of sensor data and respective information attributes corresponding to the plurality of devices and objects. | 10-16-2008 |
20090002237 | METHOD AND DEVICE FOR DETERMINING A POSITION OF A PORTABLE ELECTRONIC DEVICE - A method for determining a position of a portable electronic device is useful for conserving power, processor and bandwidth resources. The method includes detecting at a portable electronic device a first signal received from a local terminal (step | 01-01-2009 |
20090009396 | METHOD AND APPARATUS FOR LOCATIONING USING DVB-T DIGITAL TELEVISION SIGNALS - A receiver for positioning using DTV signals is provided. The receiver comprises the step of calculating a transmission time of at least one pilot signal among a plurality of pilot signals disposed within a digital television (DTV) signal or information originating from a transmitter and transmitted to a mobile receiver. | 01-08-2009 |
20090058730 | Animal Management System Including Radio Animal Tag and Additional Transceiver(s) - An animal management system includes a beacon, a radio animal tag configured to monitor the proximity of the animal tag to the beacon, and a reader configured to read information from the animal tag. | 03-05-2009 |
20090073042 | METHOD AND DEVICE FOR IMPROVED RADIO LINK PERFORMANCE - The present invention is related to a method for operating a mobile device comprising a navigation receiver and a communication terminal. The method comprises the steps of
| 03-19-2009 |
20090073043 | Apparatus for determining the location of a mobile node in a wireless system - A wireless system has a set of frequency channels that can be used for communication between a mobile node and a set of anchor nodes. The position of the mobile node is estimated by measuring the power with which wireless signals transmitted by the mobile node are received at the anchor nodes. Each anchor node cyclically scans the frequency channels, and can therefore measure the received power of wireless signals transmitted on any one of the frequency channels. When the mobile node is engaged in a call, if the measured received power drops by at least a certain amount, a quantity is added to the measured value to compensate for effects such as signal blockage by the user's hand. | 03-19-2009 |
20090085807 | COIL ARRAY FOR AN ELECTROMAGNETIC TRACKING SYSTEM - An electromagnetic tracking system comprising a transmitter coil array with two or more transmitter coils and a receiver coil array with one or more ferrite rod antennas. A transmitter or receiver coil array for an electromagnetic tracking system comprising a plurality of ferrite rod antennas positioned on a plane at different locations, with different orientations, and pointing in different directions. | 04-02-2009 |
20090091497 | Apparatus and Method For Collaborative Location Awareness Based on Weighted Maximum Likelihood Estimation - Provided is an apparatus and method for collaborative location awareness based on weighted maximum likelihood estimation (MLE), which is configured to improve accuracy of location awareness between nodes in estimating a location of a blind node. The method includes exchanging location awareness information with a reference node and a location-estimated blind node among peripheral nodes when location awareness is requested, performing location estimation based on weighted MLE, performing location calculation by using the location awareness information and an estimate obtained through the location estimation, and providing location awareness results of blind nodes. | 04-09-2009 |
20090102719 | Local location-tracking system - A local location-tracking system is installed in an indoor space, and comprises at least one tracked end, a plurality of second wireless signal transceivers and a local control end. The tracked end is movably located within the indoor space, and has at least one first wireless signal transceiver for sending a tracked signal. Each of the second wireless signal transceivers sends a detecting signal to the tracked end, the tracked end generates a response signal in accordance with the detecting signal, and the second wireless signal transceiver sends out a strength signal in accordance with a signal strength of the response signal. The local control end is applied to receive the strength signal and calculating a location coordinate of the tracked end in accordance with the signal strength. | 04-23-2009 |
20090102720 | METHOD AND DEVICE FOR AUTOMATICALLY DETERMINING THE POSITION OF TRANSCEIVERS OF NAVIGATION SIGNALS - A method and system for automatically determining the position of transceivers of navigation signals using a utilization system for the navigation signals are provided. First, coarse calibration of the coordinates of the transceivers is performed. Next, a trajectory of the utilization system is estimated. Finally, fine calibration of the coordinates of the transceivers and the trajectory of the utilization system is performed. | 04-23-2009 |
20090121939 | SYSTEM AND METHOD FOR PROVIDING TRIGGERED LOCATION INFORMATION - A system and a method for enabling a Home-SUPL Location Platform (H-SLP) to rapidly identify a currently available positioning method of a target SUPL-Enabled terminal (target SET) are provided. To this end, a message, including positioning capabilities (SET capabilities) which represent whether one or more positioning methods exist, to be transmitted from the target SET to the H-SLP is configured to additionally include information representing whether each positioning method is currently available. Accordingly, even if an electric wave environment of the target SET is changed or a positioning method is changed, the H-SLP can rapidly and efficiently perform a positioning because it always recognizes a currently available positioning method. | 05-14-2009 |
20090140923 | Systems and methods for facilitating a first response mission at an incident scene using precision location - Systems and methods for facilitating a first response mission at an incident scene, such as an accident site, a natural or human-made disaster site, or any other first response site. One system is for locating a plurality of portable modules at an incident scene. The system comprises a plurality of receivers transportable to the incident scene. The system also comprises a processing entity configured to: determine a location of a first one of the portable modules based on first data derived from a wireless signal transmitted by the first one of the portable modules and received by at least three receivers of the plurality of receivers; and determine a location of a second one of the portable modules based on the location of the first one of the portable modules and second data derived from a wireless signal transmitted by the second one of the portable modules and received by the first one of the portable modules. For example, the system enables precision location of first responders, patients and equipment at the incident scene. | 06-04-2009 |
20090153401 | MOTION DETECTION FOR TRACKING - An apparatus and method for tracking a target wherein a new position fix is taken when the measured movement of the target is more than a predetermined threshold amount or when the position fix has not been updated in a predetermined interval. The apparatus and method minimize energy use and network resources by performing position determination fixes only when needed. | 06-18-2009 |
20090153402 | REGIONAL POSITIONING METHOD AND APPARATUS IN WIRELESS SENSOR NETWORK - A regional positioning method and apparatus in a wireless sensor network (WSN) is provided. The regional positioning method in a WSN, the regional positioning method including: setting a locating premise in the WSN based on a signal strength of an anchor node; sensing an event where a sensor node, installed in a target and called a target node, joins the WSN; detecting a locating premise where the target node is located based on the sensing of the event; and recognizing a location of the target based on the detected locating premise. | 06-18-2009 |
20090160711 | METHODS, SYSTEMS AND APPARATUS FOR INTEGRATED WIRELESS DEVICE LOCATION DETERMINATION - Methods, devices, and systems are presented for integrated wireless device location determination. A method for determining location on a wireless device includes receiving a request for wireless device location and receiving a plurality of wireless network messages. Each message is transmitted from a wireless network edge device associated with one of a plurality of wireless networks. Further included is obtaining location measurement information from the received wireless network messages and obtaining location determining assistance information for each of the wireless networks associated with the received wireless network messages. The method further includes determining more than one wireless device location based on the location measurement information and the location determining assistance information, determining an integrated wireless device location based on the more than one wireless device location, validating and storing the integrated wireless device location. A method for determining wireless device location at a network device is also provided. | 06-25-2009 |
20090174603 | APPARATUS AND METHOD FOR DETERMINING LOCATION AND TRACKING COORDINATES OF A TRACKING DEVICE - An apparatus to monitor location coordinates of an electronic tracking device. The apparatus includes a transceiver, a signal processor, an accelerometer, and an antenna. The antenna communicates signal strength, to the signal processor associated with the electronic tracking device. In response to signal strength, a battery power monitor controls battery usage by electronic circuitry associated with the electronic tracking device. An accelerometer provides a supplemental location tracking system to improve tracking accuracy of a primary location tracking system of the electronic tracking device. | 07-09-2009 |
20090213009 | POSITION DETECTION SYSTEM, POSITION DETECTION SERVER, AND TERMINAL - A position detection server corrects for the attenuation of the intensity of an electric wave from each AP unit which is caused by walls by using map information to determine a distance between each AP unit and a terminal, acquires, as an existence region, a region of the position of the terminal in which variations are permitted to occur in the electric wave intensity due to the characteristics of the electric wave from the distance, restricts this existence region to an actionable region according to the state of the terminal, excludes any part which is blocked by walls when viewed from the immediately preceding position of the terminal from the actionable region by using the map information to determine a movable region, and narrows this movable region down to a region extending in the direction in which the terminal is moving to determine the position of the terminal. | 08-27-2009 |
20090219209 | LOCATION DETERMINATION - Among other disclosed subject matter, a method includes detecting that a location is to be determined. The method includes selecting at least one among multiple location determination techniques based on a selection criterion. The method includes causing the location to be determined using the selected location determination technique. | 09-03-2009 |
20090256750 | SYSTEM AND METHOD FOR POSITIONING IN CONFIGURED ENVIRONMENTS - The present invention relates to a system and method for providing location determination in a configured environment in which Global Navigation Satellite System Signals are not available. In this regard, local beacon systems generate spread spectrum CDMA signals that are received by spectral compression units that derive physically meaningful observations without a requirement for correlation of the intercepted energy by means of the known spreading codes. The invention can coexist with communication assets already in place, and the design allows for self calibration, which simplifies installation and usage. The invention has utility in applications in which GNSS signals are unavailable or limited, for example, in warehouse inventory management, in search and rescue operations and in asset tracking in indoor environments. | 10-15-2009 |
20090267838 | METHOD AND APPARATUS TO AUTOMATICALLY TRIGGER POSITION LOCATION FIXES FOR EXTERNAL DEVICES - A method and apparatus automatically triggers position location fixes for external devices. In one embodiment of the present invention, a mobile station generates position location data for a position location function in an external device in response to determining that the mobile station is electrically coupled to the external device, and in response to determining that the position location function in the external device is active. The mobile station does not generate position location data for the position location function in the external device in response to determining that the mobile station is electrically decoupled from the external device, or in response to determining that the position location function in the external device is not active. | 10-29-2009 |
20100001905 | LOCATION SYSTEM - A portable location device for use in a location system, the device comprising a transmitter for transmitting ultra-wideband signals, a receiver for receiving non-ultra-wideband signals and a control unit coupled to the receiver for controlling the operation of the device in dependence on the received non-ultra-wideband signals. | 01-07-2010 |
20100019972 | MULTI-TOUCH DETECTION - A multi-touch system is provided. The multi-touch system includes a multi-touch detection area generated by a mobile device and a first communication device, the mobile device and first or second communication device being movable relative to each other. The mobile device is operable to determine a first set of coordinates for a first detectable object within the multi-touch detection area as a function of: a distance between the mobile device and the first communication device, a distance between the mobile device and first detectable object, and a distance between the first communication device and first detectable object. | 01-28-2010 |
20100127934 | POSITIONING SYSTEM, COMMUNICATION SIGNAL RECEIVER FOR POSITIONING SYSTEM, AND POSITION CALCULATION METHOD - A positioning system is provided which is capable of calculating the position of a target object even though it does not detect some synchronous signal necessary for position calculation. A communication signal receiver which provides information used in the position calculation is also provided. The positioning system includes a plurality of communication signal receivers each to detect a communication signal from a target object to be tracked and synchronous signals repeatedly transmitted for timing synchronization, and to acquire a receiving time interval between the synchronous signals, a receiving time interval between the synchronization signal and the communication signal, and synchronization signal identification information; and a position calculator to calculate a position of the target object by calculating a receiving time error of the communication signal from the receiving time interval between the synchronous signals, the receiving time interval between the synchronization signal and the communication signal, and the synchronization signal identification information. | 05-27-2010 |
20100289699 | Method and Apparatus for Determining a Position of a Mobile Station in a Wireless Communication System - A method for determining a position of a mobile station in a wireless communication system includes generating a state equation set according to a current state of the mobile station, for predicting a position and a velocity of the mobile station after a predetermined period, and corresponding the state equation set to a graphic interface for calculating the position and the velocity after the predetermined period. | 11-18-2010 |
20110032152 | Method and Apparatus for Positioning Mobile Device - A method for positioning a mobile device includes following steps. Based on a prior location point of the mobile device, many sample particles are generated according to a prior probability distribution associated with the prior location point. A current moving track or a current behavior mode of the mobile device is obtained, and the sample particles are moved according to at least one of the current moving track and the current behavior mode. A current supposed status is obtained based on a radio frequency signal received by the mobile device. A current probability distribution of the sample particles corresponding to the radio frequency signal or the current supposed status is generated to obtain corresponding weights of the moved sample particles. A current location point of the mobile device is obtained according to the weights and distribution of the sample particles. | 02-10-2011 |
20110057840 | Method of Positioning RFID Tags - A method of positioning a RFID tag by using four antennas associated with an algorithm is disclosed. A diagram is depicted, which is about relationships between the RSSI and distance according to environment of the space. Next, four antennas are arranged in the space. Four measured distances analyzed from the RSSI curve are measured. Thereafter, a position of the RFID tag is assumed at the center of space. The position is served as an initial coordinate. Subsequently, the root mean square error (RMSE) is determined. If the RMSE is small than or equal to termination criteria, the coordinate is regarded as the position of the RFID tag, otherwise the initial 3-D coordinate is updated by adding some correcting values at each measuring weight. This process is repeated till the RMSE meets the assigned condition. | 03-10-2011 |
20110090121 | LOCATION MEASUREMENT ACQUISITION OPTIMIZATION WITH MONTE CARLO SIMULATION - The present subject matter discloses a method for estimating dilution of precision (DOP) across a service area. A Monte Carlo simulation is used to determine the DOP across a service area. Random points are selected across a service area and as well as the radio transmitters who signals are capable of being received at the random points are determined. Using the network topology of radio transmitters, a DOP is calculated for each of the random points. DOP is modeled for the service area as a function of the calculated DOP for each of the random points. The modeled DOP is used to determined the measurement accuracy required for subsequent location requests. | 04-21-2011 |
20110090122 | LOCATION MEASUREMENT ACQUISITION ADAPTIVE OPTIMIZATION - A disclosed method uses the results of location queries to tune the value of measurements of a property to obtain a statistically representative measurement for geo location. As location requests arrive, a current measurement value associated with the serving area or location is used to determine the number of measurements to obtained; the resulting uncertainty is mapped against the number of measurements required to determine that value. If additional measurements are required to achieve the target uncertainty in the result, this is recorded. The process relies on empirical observations and has the additional advantage of being blind to the actual network topology. This approach by its own nature automatically takes into account network changes whether known or unknown. | 04-21-2011 |
20110090123 | Binning Venues Into Categories Based On Propagation Characteristics - Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized to facilitate or otherwise support one or more processes or operations in connection with defining and determining a plurality of venue types and binning a plurality of venues into categories based, at least in part, on signal propagation characteristics associated with such venues. | 04-21-2011 |
20110140967 | RADIO-TRACKING METHOD, SYSTEM AND DEVICES - A device configured to be worn by a target to be located, a console device for displaying information relating to the position, direction and distance of the target with respect to a person using the console, and a system and a method for searching for and locating a target by means of radiotracking. | 06-16-2011 |
20110156957 | PRECISE POSITIONING USING A DISTRIBUTED SENSOR NETWORK - A method for determining the location and orientation of a transmitter object by measuring a set of complex electromagnetic field magnitude and phase strengths within a space using one or more receivers is provided. The method includes modeling a set of expected complex electromagnetic strengths to estimated position and orientation of the transmitter object. And estimating parameters related to the transmitter object position based on the residual error between the measured set of complex electromagnetic field values and a set of expected electromagnetic field values. Further embodiments include a method as above including a plurality of receivers with known positions within a limited space including the transmitter object. A sensor network including a plurality of receivers to perform the above method is also provided. The receivers may communicate using a wireless channel. | 06-30-2011 |
20110187597 | POSITION INFORMATION ACQUISITION DEVICE, COMPUTER READABLE STORAGE MEDIUM STORING POSITION INFORMATION ACQUISITION PROGRAM AND POSITION INFORMATION ACQUISITION SYSTEM - A position information acquisition device includes, a first communication unit to communicate with at least another position information acquisition device; a detection unit to detect whether a number of other position information acquisition devices that are not communicable with the first communication unit reaches a threshold or higher based on history information that records position information of the other position information acquisition devices that were previously communicable with the first communication unit and information of the other position information acquisition devices that are currently communicable with the first communication unit; a position measuring unit to measure a position of the position information acquisition device when the detection unit performs a detection; and a second communication unit to transmit position information measured by the position information measuring unit to a server that manages position information of the position information acquisition device and the other position information acquisition devices. | 08-04-2011 |
20110193746 | Method of Positioning RFID Tags - A method of positioning a RFID tag by using four antennas associated with an algorithm is disclosed. A positioning space is sliced into several spatial boxes with an equal size. The center of each spatial box is assumed roughly as the target position and thus the positions are used to calculate the average errors and root mean square errors. Thereafter, the errors of all spatial boxes are compared and chosen the smallest error one from them as a new positioning space. The RMSE of the selected spatial box is then compared to a predetermined value. A correcting quantity in three axial directions is then added on the coordinate of the initial position and served as a new initial position. The processes repeated till the RMSE meets the termination condition. | 08-11-2011 |
20110205124 | Object Locator System - Described is a locating system comprised of a locator and at least one target, the locator having a positioning subsystem such as a GPS receiver capable of determining its own location at any given time, a proximity subsystem such as an RFID reader capable of identifying targets and detecting whether they are within a predetermined threshold range, a memory subsystem capable of storing locations of targets for later recall, and a logic subsystem configured to record into the memory subsystem the last-known location of every target, so that whenever the locator is beyond the threshold range from the target, it can be queried for the last-known position of the target as stored in the memory. | 08-25-2011 |
20120013508 | WIRELESS LOCALIZATION TECHNIQUES IN LIGHTING SYSTEMS - The invention relates to a system and method for localization positioning in lighting systems. At least two of a Time Difference of Arrival (TDOA), Angle of Arrival (AOA), Received Signal Strength Index (RSSI) and a Position Estimation Algorithm with unified TDOA and RSSI are used to obtain localization positioning. The schemes introduce a maximum-likelihood estimation strategy incorporating a partial derivative matrix for each lighting unit using at least two reference nodes in order to achieve higher accuracy. | 01-19-2012 |
20120032854 | INTERFERENCE DETECTION, CHARACTERIZATION AND LOCATION IN A WIRELESS COMMUNICATIONS OR BROADCAST SYSTEM - A Wide Area Sensor Network (WASN) is disclosed that utilizes wideband software defined radios (SDRs) to monitor RF energy over a wide frequency range, detect when critical frequencies are being jammed or otherwise interfered with, and locate the source of the interference so that the interference can be eliminated. The WASN may use one or more geolocation techniques In addition, the WASN may detect and locate unauthorized transmitters as well as estimate the transmitted power of authorized transmitters to assure they are not transmitting more power than authorized. | 02-09-2012 |
20120056785 | METHODS AND APPARATUS FOR INCREASING THE RELIABILITY OF SIGNAL REFERENCE MAPS FOR USE IN POSITION DETERMINATION - A mobile wireless device receives a set of fingerprint prediction maps, e.g., RF signal prediction maps, and corresponding probability metrics, e.g., indicative of map reliability. A fingerprint prediction map is an expected signal measurement map corresponding to a parameter or parameters to be measured and a area given a set of expected conditions. At different times, e.g., due to different conditions, a different map in the set of fingerprint prediction maps may be more likely to be accurate. The mobile wireless device updates the probability metrics, associated with different alternative maps in the set of maps, as a function of one or more of: known information, sensor readings, measurements, detected information, and position determination. The mobile wireless device determines its current position using fingerprint predication maps and one or more updated probability metrics. | 03-08-2012 |
20120062427 | Positioning Method and Wireless Communication System Using the Same - A positioning method is disclosed. The positioning method includes providing a reference information comprising a plurality of predetermined RSSI values corresponding to a plurality of directional antennas receiving signals from a plurality of areas, utilizing the plurality of directional antennas to scan and detect a wireless communication device, calculating a plurality of RSSI values corresponding to the wireless communication device for the plurality of directional antennas, comparing the plurality of detected RSSI values with the reference information to generate a comparison result, and determining a location position of the wireless communication device according to the comparison result. | 03-15-2012 |
20120169542 | SYSTEM AND METHOD FOR POSITIONING USING HYBRID SPECTRAL COMPRESSION AND CROSS CORRELATION SIGNAL PROCESSING - The present invention relates to a system and method for positioning and navigation using hybrid spectral compression and cross correlation signal processing of signals of opportunity, which may include Global Navigation Satellite System (GNSS) as well as other wideband energy emissions in GNSS obstructed environments. Examples of these signals of opportunity include but are not limited to GPS, GLONASS, cellular Code Division Multiple Access (CDMA) communications signals, and 802.11 Wi-Fi. Combining spectral compression with spread spectrum cross correlation enables extraction of code and carrier observables without the need to implement the tracking loops (e.g. Costas tracking loop) commonly used in conventional GNSS receivers. For applications where dynamics and transmission medium may make it difficult to continuously track carrier phase, the hybrid approach of the present invention has significant utility. | 07-05-2012 |
20120194388 | METHOD AND SYSTEM FOR HEURISTIC LOCATION TRACKING - A method and system for provision of a notification based on location of a target device and heuristic information, the method maintaining, in a storage module, a location profile of a target mobile device based on heuristic information for the target mobile device; receiving the current location of the target mobile device; verifying whether the current location deviates from the location profile; and if the current location deviates from the location profile, triggering a notification to an observer device. | 08-02-2012 |
20120280864 | POSITION SENSOR - An exemplary position sensor can be provided that can include a transmitting arrangement for configured to generate electromagnetic waves, a receiving arrangement configured to detect electromagnetic waves, and a position arrangement. The transmitting arrangement and the receiving arrangement can be moved relative to the position arrangement. The position arrangement can influence the electromagnetic waves of the transmitting arrangement such that the presence of the position arrangement can be detected in the vicinity of the transmitting arrangement and the receiving arrangement. | 11-08-2012 |
20120306699 | LOW ACCURACY POSITIONAL DATA BY DETECTING IMPROBABLE SAMPLES - An embodiment of the invention provides a method of determining a location of a mobile target that processes locations for the target provided by a wireless location technology tracker system to determine if the locations are outliers, discards locations that are determined to be outliers, and uses locations determined not to be outliers as locations for the target. | 12-06-2012 |
20120313820 | SYSTEM TECHNIQUE FOR CONICAL GEO-LOCATION OF RADIO FREQUENCY SOURCES - A system comprises a single linear antenna array, an RF receiver and a processor. The processor includes an RF extraction module configured to extract information from the RF signal and a target location module. The target location module is configured to calculate a first target likelihood distribution for possible locations of the target object using information extracted from an RF signal received using a first antenna array orientation, calculate a second target likelihood distribution for possible locations of the target object using information extracted from an RF signal received using a second antenna array orientation, and identify a most probable location of the target object based on a combination of the first and second target likelihood distributions. | 12-13-2012 |
20130016012 | METHOD AND/OR APPARATUS FOR BACKTRACKING POSITION ESTIMATION - Disclosed are methods, systems and apparatuses for computing position fixes according to a motion model. Particles may be propagated based, at least in part, on measurements received at a mobile device according to the motion model. A particular cluster of the propagated particles may then be selected to represent a state of the mobile device based, at least in part, on weights applied to particles in the clusters. The selected clusters may be retroactively changed so that the sequence of position fixes satisfies geometrical and dynamic feasibility constraints. The updated sequence of position fixes can be made available to high-level navigation applications for instance for user track display updating. | 01-17-2013 |
20130038488 | ENHANCED RF LOCATION METHODS AND SYSTEMS - Methods and systems that use the time-wise stability of RF location systems and the short time accuracy and spatial stability of inertial tracking system to increase the accuracy of tracking method. | 02-14-2013 |
20130038489 | AEROSTATIC PLATFORM FOR MONITORING AN EARTH-BASED SENSOR NETWORK - An aerostatic platform for monitoring an earth-based sensor network. The aerostatic platform includes an aerostat, at least one antenna coupled with the aerostat, and a plurality of restraints. The antenna is configurable to receive a signal transmitted from at least one sensor in the earth-based sensor network. The plurality of restraints is configurable for fixing the antenna in a fixed aerial location above the earth-based sensor network, and for maintaining the antenna in a sufficiently stationary position relative to the sensor to triangulate a location of the sensor from a locator signal received by the antenna. A sensor-network-monitoring system is also provided, along with a method for deploying the sensor-network monitoring system. | 02-14-2013 |
20130057435 | AUXILIARY AP TAG AND POSITIONING SYSTEM USING THE SAME - Provided is an auxiliary Access Point (AP) tag and a positioning system using the same, wherein the auxiliary AP tag simpler in structure than a conventional AP is arranged at the system to be provided with only a function of transmitting an identifier (e.g., a service set identifier), whereby position accuracy can be stably obtained and cost can be reduced. | 03-07-2013 |
20130082876 | POSITION MARKING AND REFERENCE METHOD AND SYSTEM FOR THE PRACTICE - A method and system are provided for position marking to register precise locations on a stationary objects in space, and to refer back to the locations that same precise location at a later time, while establishing a local coordinate system without consideration for the global location or orientation of the object, thereby ensuring the object does not need to be re-positioned or re-orientated before marking and referring to any object's locations. The problem that a local coordinate reference system based on reference beacons is not correlated to the object's reference frame is addressed through a novel calibration method. By eliminating consideration for coordinate setup and the need to physically move the object in the operating space, a more robust measurement is achieved that replaces such conventional steps with an easy to conduct calibration process that reduces the chance for human error. | 04-04-2013 |
20130099976 | SYSTEM AND METHOD OF LOCATING MISSING NODES IN NETWORKS - Systems and methods of locating missing endpoints in a utility meter network include periodically receiving electronic GPS data including coordinates identifying the physical location of a mobile meter reading device and collecting radio frequency (RF) data transmissions sent by one or more missing endpoints in proximity to the mobile meter reading device. Energy levels associated with the RF data transmissions can be used to determine a signal strength indicator for each transmission. The transmissions are collected while the mobile meter reading device is positioned in at least first and second different locations relative to each missing endpoint. A triangulation procedure is electronically implemented using the GPS coordinates and the signal strength indicator for a given missing endpoint as determined in the at least first and second different locations in order to identify an estimated location for the given missing endpoint, which is provided as electronic output to a user. | 04-25-2013 |
20130099977 | METHOD AND/OR APPARATUS FOR GEOFENCE MANAGEMENT - Disclosed are a system, method or device for maintaining a geofence to provide alerts in response to an object entering or exiting an area bounded by the geofence. In one example implementation, a geofence may be temporarily altered. In particular examples, such an alteration of a geofence may comprise changing a size or shape of the geofence. | 04-25-2013 |
20130113660 | DETERMINING THE GEOGRAPHIC LOCATION OF A PORTABLE ELECTRONIC DEVICE - A self-positioning portable electronic device comprises a signal receiving unit for receiving a signal from one or more remote transmitters, and a local positioning unit for determining a local position of the device. The device operates to obtain a plurality of data samples from the signal at different time points during a measurement period with movement of the portable electronic device along an arbitrary trajectory, associate each data sample with a local position obtained from the local positioning unit so as to form a synthetic antenna array, obtain an array response of the synthetic antenna array, and identify the geographic location of the portable electronic device, by processing the synthetic antenna array as a function of the array response and using knowledge about the geographic location of the transmitter(s). | 05-09-2013 |
20130187812 | ANTENNA COUPLER MECHANISM SYSTEMS AND METHODS - Systems and methods are provided for an antenna coupler mechanism. The antenna coupler mechanism includes a bottom plate that includes a first conductor that is configured to couple energy into a nearby structure. A first tuning leg is connected in parallel with the bottom plate by a first set of electrical connections. The first tuning leg includes a second conductor and is configured to accept a radio frequency device in series with the second conductor. A second tuning leg is connected in parallel with the bottom plate by a second set of electrical connections. The second tuning leg includes a third conductor and a capacitor connected in series. | 07-25-2013 |
20130194135 | DYNAMIC COMPENSATION FOR WIRELESS DEVICE LOCATION DETERMINATION - Determining a location estimate of a wireless communications device can depend on the dynamic and/or static state of the device. Compensation processing is applied to a location estimate (or to information from which such an estimate is derived, in use) if required, given the dynamic and/or static state of the device. | 08-01-2013 |
20130241775 | SYSTEM AND METHOD FOR IMPLEMENTATION OF A DIRECT SEQUENCE SPREAD SPECTRUM TRANSMITTER - A direct sequence spread spectrum data transmitter for creating a modulated data signal comprising: a programmable-system-on-a-chip baseband modulator having only four blocks of programming logic, the four blocks of programming logic consisting of a DigBuf clock buffer block, a pseudo-random-sequence 8-bit block, an 8-bit timer block, and a serial peripheral interface slave block. A remote telemetry unit comprising the foregoing transmitter. A method for manufacturing the foregoing transmitter. A method for controlling the foregoing transmitter. | 09-19-2013 |
20130249736 | SYNTHETIC APERTURE RFID HANDHELD WITH TAG LOCATION CAPABILITY - A system for determining a bearing or location of a radio frequency identification (RFID) tag using a handheld RFID reader is described. In one embodiment, the reader is equipped with an accelerometer. A user moves the reader while the reader receives the tag's signal and determines the tag signal's phase at multiple locations. The locations of the reader antenna can be reconstructed using the accelerometer data. By using the phase determined at multiple locations in conjunction with the location of the reader antenna, the reader can determine the bearing of the tag. For an RFID reader not equipped with an accelerometer, the sign and ratio of the rate of change in the phase of a tag's signal to the distance traveled by the reader antenna can be used to determine the location of the tag relative to the reader. | 09-26-2013 |
20130265199 | COMPACT POLARIZED ANTENNA AND METHODS - A right-hand circular polarized antenna and associated methods. In one embodiment, a quarter-wave antenna configuration is used within a small form factor portable device (e.g. wristwatch). The antenna comprises a radiator element which operates in as a linear polarized antenna while the device is operating in free space. However, when the device is attached to a user (e.g. at a user's wrist), the antenna utilizes the loading of the user's body tissue in order to suppress unwanted signals (e.g. left hand polarized signals) to permit operation in circular polarized mode (e.g. right hand polarized mode), thereby allowing for increased sensitivity to received circularly polarized signals such as those emanated from global positioning satellites. | 10-10-2013 |
20130271324 | SYSTEMS AND METHODS CONFIGURED TO ESTIMATE RECEIVER POSITION USING TIMING DATA ASSOCIATED WITH REFERENCE LOCATIONS IN THREE-DIMENSIONAL SPACE - Systems, methods and computer program products for determining a position location estimate for a remote receiver based on one or more time-of-arrival measurements transmitted from one or more transmitters and first timing data associated with the one or more transmitters and further associated with one or more reference locations within a reference area of the remote receiver are described. | 10-17-2013 |
20130314281 | SATELLITE POSITIONING SYSTEM ENABLED TRAFFIC DETERMINATION - The present invention is directed to utilizing monitoring devices ( | 11-28-2013 |
20130328724 | Receive Only Mode for Clock Drift Correction - In some implementations, radio access technology (RAT) signals can be monitored and used to synchronize an internal clock of a mobile device to a network system clock without registering the mobile device to the network. In some implementations, a RAT processor can be configured to receive RAT signals and to prevent transmission of RAT signals. In some implementations, the internal clock can be associated with a GNSS processor and can be used to calculate a location of the mobile device. In some implementations, a RAT processor that is configured for a particular radio access technology can be configured to monitor signals associated with another radio access technology when synchronizing the internal clock. In some implementations, the RAT processor can monitor signals in response to a power event. The power event can be associated with powering a display of the mobile device. | 12-12-2013 |
20140104112 | SYSTEM AND METHOD FOR DETERMINING GEO LOCATION OF A TARGET USING LOCUS OF EMITTER POSITIONS (LEP) - A system and method for determining geo position of a target by an aircraft, including: (a). electronically receiving navigation data related to the aircraft and multilateration information related to the target; (b). electronically calculating a locus of emitter positions (LEP) curve from the received navigation data and multilateration information; (c). repeating steps (a) and (b), as the aircraft moves toward or away from the target; (d). electronically accumulating, in a computer storage medium, the calculated LEP curves; and (e). electronically determining a position that is closest to all the accumulated LEP curves to establish a position of the target. | 04-17-2014 |
20140125525 | System and Method For Situational Awareness - A method for determining location of a person relative to a vehicle. A first device comprising a Bluetooth transceiver is associated with the person, and a second device comprising a Bluetooth transceiver is associated with the vehicle. The method includes determining whether the strength of a signal received by one device from the other device via has diminished below a predetermined level, in which case a notification is provided to a computer system via wireless data communication that the status has changed from a first link status wherein the first device is within a predeterminable distance from the second device to a second link status wherein the first device is beyond the predeterminable distance from the second device. | 05-08-2014 |
20140139374 | KALMAN FILTERING WITH INDIRECT NOISE MEASUREMENTS - Accurate remote tracking of fixed objects from a moving platform requires overcoming platform noise. Such tracking becomes difficult when the only inertial reference (such as a central aircraft inertial navigation system) is remote from the sensor, which experiences non-measured angular movements due to airframe vibrations and flexing. In such a scenario, Kalman filtering cannot converge on a true value because all noise sources are not known. Current naïve approaches arbitrarily boost noise with fixed additive or multiplicative factors. However, such approaches slow filter response and; thus, often fail to give timely results. Embodiments of the present disclosure derive inertial reference parameters to quantify noise of the sensor that is remote from the inertial reference. Advantageously, disclosed embodiments enable use of remote sensors with an existing inertial reference, rather than consolidating sensors and the inertial reference at a single location or providing inertial references at each sensor. | 05-22-2014 |
20140210671 | Computerized Device for Object Locating System and Method Thereof - A computerized device for use with an object location system and method thereof is provided. The computerized device includes at least one processor in communication with a memory device, the memory device storing a quantity of programmable code having a plurality of processor-executable instructions. A communication element is connected between the processor and at least one monitoring unit. The at least one monitoring unit is positioned remote from the computerized device and a locating circuit substantially secured to an object intermittently communicates an omnidirectional signal to the at least one monitoring unit. A calculator is in communication with the processor. The calculator directs the processor to determine a duration of transmission time of the omnidirectional signal communicated from the locating circuit to the at least one monitoring unit directs the processor to calculate a location of the locating circuit using the determined duration of transmission time of the omnidirectional signal. | 07-31-2014 |
20140218240 | INTERFEINTERFENCE CANCELLATION SYSTEM FOR LOCATION AND DIRECTION FINDING - Systems and methods for cancelling interference while performing direction/location. A combined signal of interest plus interference signal may be received. A copy or sample of the interference signal may be determined. The interference signal and the combined signal of interest plus interference signal may be converted to the optical domain. The interference signal may be optically phase shifted by −180 degrees, which may result in an optically inverted interference signal. The optically inverted interference signal may be variably optically attenuated and/or variably optically time delayed. As a result, interference cancellation of the interference signal from the combined signal of interest plus interference signal may be achieved, resulting in 50 dB or more of cancellation of the interference signal. Direction and/or location finding techniques can be applied to received signals during and/or after interference cancellation. | 08-07-2014 |
20140292582 | SYSTEM FOR LOCATING DEVICES USING DIRECTIONAL ANTENNAS - A method and system for locating a device in a data center are pro | 10-02-2014 |
20140300516 | SYSTEMS AND METHODS OF WIRELESS POSITION TRACKING - Position and orientation tracking systems and methods include a transmitting antenna transmitting a radio frequency (RF) signal. At least one receiving antenna acquires the RF signal. One of the at least one receiving antenna and the transmitting antenna is designated a reference antenna. A processing unit determines a phase difference between the RF signal received by each receiving antenna and the reference antenna. The processing unit computes a position of the transmitting antenna with respect to the at least one receiving antenna in response to the phase difference determined for each receiving antenna. | 10-09-2014 |
20140361926 | 2D WEB TRILATERATION - The invention provides systems and methods of locating a network device based on the time latency between a request by a user device and the receipt of the request by a plurality of satellite servers provided at different locations. Preferably three or more satellites may be employed. The request may be for an item, which may have a known file size, and which may or may not exist. Triangulation techniques may be utilized to determine the location of the device relative to the satellite servers. | 12-11-2014 |
20150009073 | System and Method for Physically Detecting, Identifying, Diagnosing and Geolocating Electronic Devices Connectable to a Network - An emissions detection apparatus for at least one of detecting, identifying, diagnosing and geolocating an electronic device or an information transmitted from the electronic device includes an emissions collections device connected to an antenna receiving emission of an electromagnetic energy emitted from the electronic device and collecting a spectral data emitted from the electronic device; one or more algorithms processing the collected spectral data, algorithms selected from a group consisting of a peak detection algorithm, a multiple peak detection algorithm, a harmonic correlation algorithm, a non-harmonic correlation algorithm, a time correlation algorithm, a phase correlation algorithm, and a duty cycle timing correlation algorithm; and one or more algorithms matching the processed spectral data to an emissions template, wherein a match of the processed spectral data with the emissions template at least one of detects, identifies, diagnoses and geolocates the electronic device or the information transmitted from the electronic device. | 01-08-2015 |
20150015442 | SYSTEM AND METHOD TO FIND LOST OBJECTS - The invention disclosed herein is a system and method to locate lost objects. The system ( | 01-15-2015 |
20150042516 | METHOD, DEVICE AND SYSTEM FOR POSITIONING TERMINAL - Provided are a terminal positioning method, device and system, the method comprising: receiving three-dimensional positioning measurement information transmitted by a terminal; and acquiring the three-dimensional position information of the terminal according to the three-dimensional positioning measurement information. | 02-12-2015 |
20150097731 | GPS/WIFI INDOOR/OUTDOOR DETECTION - A portable communication device and method provide for determining indoor or outdoor location of the device. The method includes measuring a signal strength of at least one of a location service signal, a RAN signal, and a small coverage area signal that is detectable within a current location of the portable communication device, comparing signal strength to corresponding pre-established signal strength threshold, and obtaining contextual information by accessing sensor data from at least one sensor selected based on a result of the comparing. The method also includes configuring the portable communication device for operation within an outdoor space in response to determining that the portable communication device is transitioning from the indoor space to the outdoor space and configuring the portable device for operation within an indoor space in response to determining the portable device is transitioning from the outdoor space to the indoor space. | 04-09-2015 |
20160033634 | SYNTHETIC APERTURE RFID HANDHELD WITH TAG LOCATION CAPABILITY - A system for determining a bearing or location of a radio frequency identification (RFID) tag using a handheld RFID reader is described. In one embodiment, the reader is equipped with an accelerometer. A user moves the reader while the reader receives the tag's signal and determines the tag signal's phase at multiple locations. The locations of the reader antenna can be reconstructed using the accelerometer data. By using the phase determined at multiple locations in conjunction with the location of the reader antenna, the reader can determine the bearing of the tag. For an RFID reader not equipped with an accelerometer, the sign and ratio of the rate of change in the phase of a tag's signal to the distance traveled by the reader antenna can be used to determine the location of the tag relative to the reader. | 02-04-2016 |
20160047882 | METHOD FOR DETERMINING THE LOCATION OF A MOBILE DEVICE WITHIN A BUILDING, AND APPARATUSES FOR PERFORMING SAME - When an optical motion detector of a room device detects movement in a room in which it is installed, the room device transmits a radio message including its position. Upon receiving the radio message, a mobile device measures the signal strength to determine whether it is high. If the movement detected by the optical motion detector correlates chronologically with movement detected by an inertial movement sensor of the mobile device, the mobile device concludes that the mobile device is located in the room or in proximity of the position of the room device. The identity of the mobile device is protected, as no server or other device is required for positioning to which the mobile device would have to disclose the identity, position or sensor information thereof. | 02-18-2016 |
20160084933 | METHOD OF UPDATING A LOCATION INFORMATION REPRESENTING A PHYSICAL LOCATION OF A COMMUNICATION DEVICE, A COMPUTER PROGRAM PRODUCT FOR EXECUTING THE METHOD, AND A COMMUNICATION SYSTEM FOR UPDATING THE LOCATION INFORMATION - A method of updating a location information, which represents a physical location of a communication device ( | 03-24-2016 |
20160131734 | SYSTEMS AND METHODS FOR COHERENT SIGNAL FUSION FOR TIME AND FREQUENCY ESTIMATION - A signal processing system is provided. The signal processing system includes a transmission architecture configured to transmit first and second signals, and a receiver architecture including an antenna configured to receive the signals, and a coherent signal fusion processing device communicatively coupled to the antenna. The processing device is configured to generate a broadband analog signal that contains the first and second signals, digitize the broadband analog signal, isolate first and second signals of interest, estimate, relative to a reference template, at least one of a time difference of arrival and a frequency difference of arrival for at least one of the first and second signals of interest, and determine a location of at least one of the transmission architecture and the receiver architecture based on the estimated at least one of a time difference of arrival and a frequency difference of arrival. | 05-12-2016 |
20160161590 | Radio Frequency Identification Tag Location Estimation and Tracking System and Method - Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID. | 06-09-2016 |
20160377698 | SYSTEM AND A METHOD FOR TRACKING MOBILE OBJECTS USING CAMERAS AND TAG DEVICES - A method and system for tracking mobile objects in a site are disclosed. The system comprises a computer cloud communicating with one or more imaging devices and one or more tag devices. Each tag device is attached to a mobile object, and has one or more sensors for sensing the motion of the mobile object. The computer cloud visually tracks mobile objects in the site using image streams captured by the imaging devices, and uses measurements obtained from tag devices to resolve ambiguity occurred in mobile object tracking. The computer cloud uses an optimization method to reduce power consumption of tag devices. | 12-29-2016 |