Patent application number | Description | Published |
20080225981 | SYSTEM AND METHOD FOR SYNCHRONIZATION, POWER CONTROL, CALIBRATION, AND MODULATION IN COMMUNICATION TRANSMITTERS - A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period. | 09-18-2008 |
20080225984 | Digital Polar Transmitter - A digital polar transmitter includes a baseband processor configured to receive an input signal and to convert the input signal into a baseband amplitude component and a baseband phase component. The transmitter also includes a phase modulator in communication with the baseband processor. The phase modulator is configured to modulate an RF carrier signal based on the phase component and to generate a phase-modulated RF carrier signal. A power amplifier is provided in communication with the baseband processor and the phase modulator. The power amplifier is configured to amplify the phase-modulated RF carrier signal based on the baseband amplitude component and to generate an amplified RF signal. The transmitter also includes a digital feedback loop in communication with the power amplifier and the baseband processor. The digital feedback loop is configured to detect the amplified RF signal and to provide a digital amplitude feedback signal and a detected phase feedback signal to the baseband processor. | 09-18-2008 |
20090251195 | CALIBRATION TECHNIQUES FOR NON-LINEAR DEVICES - An apparatus may include a non-linear module, a control module, and a calibration module. The non-linear module produces an output signal from an input signal. The control module selects, upon an occurrence of a calibration condition, a calibration operation from two or more calibration operations. Each of the two or more calibration operations may generate one or more correction values for the non-linear module. Further, each of the calibration operations produces the input signal from a pre-input signal. This selected calibration operation is performed by the calibration module. The two or more calibration operations include a first calibration operation and a second calibration operation. The first calibration operation produces the input signal from the pre-input signal according to a predictive technique. The second calibration operation produces the input signal from the pre-input signal according to a non-predictive technique. | 10-08-2009 |
20110085619 | SYSTEM AND METHOD FOR SYNCHRONIZATION, POWER CONTROL, CALIBRATION, AND MODULATION IN COMMUNICATION TRANSMITTERS - A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period. | 04-14-2011 |
20130279373 | METHOD AND APPARATUS FOR PROVIDING AN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM TRIGGERING SERVICE - A method and apparatus are described for providing triggering services over multiple access networks. A triggering service server (TSS) architecture includes a triggering identity function (TIF) which maintains a database of device and application identifier mappings across multiple access networks, triggering capabilities and triggering preferences. The TSS also includes a triggering decision function (TDF) that uses information from the TIF and determines how triggers should be performed towards a device and/or an application hosted on a particular device. The TSS also includes triggering gateways (T-GWs) that perform triggering in different domains. A “not-registered-triggerable” state may be used to indicate whether an entity, such as a device, application or user can receive triggers although it is not registered in a specific access network. Methods and apparatus are also described for implementing various unassisted triggering and assisted triggering procedures using wireless transmit/receive units (WTRUs), application servers (ASs) and service capability servers (SCSs). | 10-24-2013 |
20140067902 | METHOD AND APPARATUS FOR USING MULTIPLE UNIVERSAL RESOURCE IDENTIFIERS IN M2M COMMUNICATIONS - A method and apparatus may use multiple URIs (MU) in a single request message for machine-to-machine (M2M) communication networks. Multiple single URI (SU)-type request messages may be received from an application client (e.g. a constrained application protocol (CoAP)/hypertext transfer protocol (HTTP) client) at a (CoAP/HTTP) intermediary node. The multiple SU-type request messages may be aggregated into a single MU-type request message at the intermediary node, and the single MU-type request message may be transmitted to a (CoAP/HTTP) server. A multiple value (MV)-type response message may be received from the (CoAP/HTTP) server. The MV-type response message may be deaggregated into multiple single value (SV)-type response messages. The multiple SV-type response messages may be transmitted to the (CoAP/HTTP) client. | 03-06-2014 |
20140379804 | CONTEXT MANAGEMENT - Systems, methods, and apparatus embodiments are described herein for context information management at the medium access control layer. In one embodiment, a system comprises a plurality of peers which communicate via peer-to-peer communications. In the system, context information may be exchanged at the MAC layer. Examples of context information include, without limitation, location information, mobility information, device capability, user information, an application category, multi-hop information, a channel condition, application information, association identifiers, and device information. Each of the plurality of peers may include a context manager that resides on each peer device. For example, a first context manager that resides on a first peer of the plurality of peers may exchange context information with a second context manager that resides on a second peer of the plurality of peers. In another example embodiment, the first peer, and in particular the first context manager that resides on the first peer, can retrieve the context information from a layer that is different than the MAC layer. | 12-25-2014 |
20150016359 | PEER-TO-PEER COMMUNICATIONS ENHANCEMENTS - An enhanced general superframe structure for peer-to-peer communications in proximity is disclosed, which may be implemented in connection with a variety of different channel access techniques. Additionally, methods are disclosed for enabling multiple P2PNWs in proximity operating under different control schemes, including virtually centralized control, distributed control, and hybrid control, to co-exist. A hyperframe structure is also disclosed, which may comprise two or more superframes, each superframe corresponding to a different one of the corresponding P2PNW control schemes. | 01-15-2015 |
20150019717 | CONTEXT-AWARE PROXIMITY SERVICES - Disclosed herein are a variety of systems, operations, MAC primitives, and procedures for context-aware Peer-to-Peer communications and multi-application Peer-to-Peer communications. An example system for a context-aware Peer-to-Peer communications system may include a physical and Medium Access Control (PHY/MAC) layer and an upper layer above the PHY/MAC layer. The PHY/MAC layer may include at least one of a discovery function, an association function, a data transceiving function, a channel management function, a general scan function, a synchronization function, a power control function, or management and reporting function. The upper layer may be one of a service layer or an application layer. | 01-15-2015 |
20150055640 | METHOD AND APPARATUS FOR SUPPORTING MACHINE-TO-MACHINE COMMUNICATIONS - A method and apparatus for distributed services and data in a machine-to-machine (M2M) communication network are disclosed. A network server, an M2M gateway, and M2M devices include an M2M service capability layer for supporting M2M service capabilities, respectively. Reference points may be defined for interactions between network service capability layers, between gateway service capability layers, between a gateway service capability layer and a device service capability layer of an M2M device, between M2M device applications, and/or between a network, gateway, or device service capability layer and an M2M application. The network server may be split into a control server and a data server at a service capability layer to provide service capabilities for control functions and service capabilities for data functions, respectively. The data server may be configured to interact with another data server to push or pull data or resources either directly or indirectly via the control server. | 02-26-2015 |