Patent application number | Description | Published |
20080294969 | RATE-COMPATIBLE PROTOGRAPH LDPC CODE FAMILIES WITH LINEAR MINIMUM DISTANCE - Digital communication coding methods are shown, which generate certain types of low-density parity-check (LDPC) codes built from protographs. A first method creates protographs having the linear minimum distance property and comprising at least one variable node with degree less than 3. A second method creates families of protographs of different rates, all having the linear minimum distance property, and structurally identical for all rates except for a rate-dependent designation of certain variable nodes as transmitted or non-transmitted. A third method creates families of protographs of different rates, all having the linear minimum distance property, and structurally identical for all rates except for a rate-dependent designation of the status of certain variable nodes as non-transmitted or set to zero. LDPC codes built from the protographs created by these methods can simultaneously have low error floors and low iterative decoding thresholds, and families of such codes of different rates can be decoded efficiently using a common decoding architecture. | 11-27-2008 |
20100299581 | SERIAL TURBO TRELLIS CODED MODULATION USING A SERIALLY CONCATENATED CODER - Serial concatenated trellis coded modulation (SCTCM) includes an outer coder, an interleaver, a recursive inner coder and a mapping element. The outer coder receives data to be coded and produces outer coded data. The interleaver permutes the outer coded data to produce interleaved data. The recursive inner coder codes the interleaved data to produce inner coded data. The mapping element maps the inner coded data to a symbol. The recursive inner coder has a structure which facilitates iterative decoding of the symbols at a decoder system. The recursive inner coder and the mapping element are selected to maximize the effective free Euclidean distance of a trellis coded modulator formed from the recursive inner coder and the mapping element. The decoder system includes a demodulation unit, an inner SISO (soft-input soft-output) decoder, a deinterleaver, an outer SISO decoder, and an interleaver. | 11-25-2010 |
20110307756 | RATE-COMPATIBLE PROTOGRAPH LDPC CODES - Digital communication coding methods resulting in rate-compatible low density parity-check (LDPC) codes built from protographs. Described digital coding methods start with a desired code rate and a selection of the numbers of variable nodes and check nodes to be used in the protograph. Constraints may be set to satisfy a linear minimum distance growth property for the protograph. All possible edges in the graph are searched for the minimum iterative decoding threshold and the protograph with the lowest iterative decoding threshold is selected. Protographs designed in this manner may be used in decode and forward relay channels. | 12-15-2011 |
20120131409 | RATE-COMPATIBLE PROTOGRAPH LDPC CODE FAMILIES WITH LINEAR MINIMUM DISTANCE - Digital communication coding methods are shown, which generate certain types of low-density parity-check (LDPC) codes built from protographs. A first method creates protographs having the linear minimum distance property and comprising at least one variable node with degree less than 3. A second method creates families of protographs of different rates, all structurally identical for all rates except for a rate-dependent designation of certain variable nodes as transmitted or non-transmitted. A third method creates families of protographs of different rates, all structurally identical for all rates except for a rate-dependent designation of the status of certain variable nodes as non-transmitted or set to zero. LDPC codes built from the protographs created by these methods can simultaneously have low error floors and low iterative decoding thresholds. | 05-24-2012 |
20120275546 | MULTIPLE SYMBOL NONCOHERENT SOFT OUTPUT DETECTOR - Multiple symbol noncoherent soft output detectors in accordance with embodiments of the invention are disclosed. In a number of embodiments, the multiple symbol noncoherent soft output detector uses soft metrics based on the Log Likelihood Ratio (LLR) of each symbol to provide information concerning the reliability of each detected symbol. One embodiment of the invention includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols. | 11-01-2012 |
20130139024 | HIGH ORDER MODULATION PROTOGRAPH CODES - Digital communication coding methods for designing protograph-based BICM that is general and applies to any modulation. The general coding framework can support not only multiple rates but also adaptive modulation. The method is a two stage lifting approach. In the first stage, an original protograph is lifted to a slightly larger intermediate protograph. The intermediate protograph is then lifted via a circulant matrix to the expected codeword length to form a protograph-based LDPC code. | 05-30-2013 |
20130202062 | COLLISION DETECTION USING A MULTIPLE SYMBOL NONCOHERENT SOFT OUTPUT DETECTOR - Systems and methods for detecting collisions in radio frequency tags in accordance with embodiments of the invention are disclosed. In one embodiment, a receiver system includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols, a collision detector configured to calculate a decision metric from a set of soft metrics generated by the multiple symbol noncoherent soft output detector and detect a collision when the decision metric satisfies a predetermined criterion. | 08-08-2013 |
20150215073 | Collision Detection Using a Multiple Symbol Noncoherent Soft Output Detector - Systems and methods for detecting collisions in radio frequency tags in accordance with embodiments of the invention are disclosed. In one embodiment, a receiver system includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols, a collision detector configured to calculate a decision metric from a set of soft metrics generated by the multiple symbol noncoherent soft output detector and detect a collision when the decision metric satisfies a predetermined criterion. | 07-30-2015 |
Patent application number | Description | Published |
20130043118 | Methods and Apparatus for Purifying Liquid Using Regenerating Heat Exchange - A method and apparatus for liquid purification using regenerating heat exchange are disclosed. An apparatus, in one embodiment, includes a liquid receptacle, a heat exchanger, a heating mechanism, a compressor, and a condenser. While the liquid receptacle is able to receive a stream of liquid such as water, a heat exchanger pushes the liquid through the heat exchanger to increase temperature of the liquid. The heating mechanism is capable of facilitating phase transition of the liquid from liquid to vapor. The compressor is operable to guide the vapor and the condenser is configured to condense the vapor into liquid or purified liquid. | 02-21-2013 |
20130118714 | Method and Apparatus for Reclaiming Heat During Liquid Purification Using Heat Exchanges - A system capable of providing a liquid purification process using heat regenerating or recovering via heat exchangers (“HEs”). The system, in one embodiment, includes a first set of thermal conductive channels (“TCC”), a second set of TCC, and a third set of TCC. The first set of TCC configured in a first HE is arranged in cylindrical shape which is able to surround or enclose a boiler. A function of TCC is to guide a liquid flow traveling through an HE. The second set of TCC configured in a second HE guides a second liquid flow traveling through the second HE. The third liquid flow such as a cold water stream, for example, flows through the third set of TCC adjacent to the first set of TCC and extracts heat from the first liquid flow such as hot purified water via TCC. | 05-16-2013 |
20140339071 | Method and Apparatus for Heating During a Liquid Purification Process Using an Electromagnetic Heater - A liquid processing system is able to purify liquid such as water using an electromagnetic heater. The system, in one embodiment, includes a main boiler, a bottom boiler, a heating element, and a heating coil. The main boiler is structured to have a cylindrical shape and is configured to separate purified liquid from incoming liquid. The bottom boiler, configured to couple to the main boiler, holds at least a portion of incoming liquid for purification process. While the heating coil, which is situated adjacent to the heating element, is able to generate a magnetic field in accordance with an electrical current, the heating element produces heat needed for purification process in response to the magnetic field. | 11-20-2014 |
Patent application number | Description | Published |
20140302103 | HAIR CARE COMPOSITION COMPRISING A PRE-EMULSIFIED FORMULATION - A hair care composition comprising from about 0.25% to about 80% of a pre-emulsified emulsion comprising from about 0.005% to about 80% of one or more materials selected from the group comprising metathesized unsaturated polyol esters, sucrose polyesters, fatty esters with a molecular weight greater than or equal to 1500 and mixtures thereof and mixtures thereof or, by weight of said hair care composition; wherein an emulsifier is selected from the group consisting of anionic, non-ionic, cationic, amphoteric and mixtures thereof wherein the average particle size of the pre-emulsified oil in water emulsion is from about 20 nanometers to 20 microns; and a cationic surfactant system wherein the composition is stable with respect to one of the following measures selected from emulsion particle size, viscosity or visual phase separation and mixtures thereof. | 10-09-2014 |
20150359725 | Method of Treating Hair with a Concentrated Conditioner - A method of treating the hair including providing a concentrated hair care composition in an aerosol foam dispenser. The concentrated hair care composition includes one or more silicones, perfume, and less than 10% high melting point fatty compounds. The method also includes dispensing the concentrated hair care composition from the aerosol foam dispenser as a dosage of foam; applying the foam to the hair; and rinsing the foam from the hair. The foam has a density of from about 0.025 g/cm | 12-17-2015 |
20150359726 | Method of Treating Hair with a Concentrated Conditioner - A method of treating the hair including providing a concentrated hair care composition in a mechanical foam dispenser. The concentrated hair care composition includes one or more silicones, from about 1% to about 5% perfume, and is substantially free of high melting point fatty compounds. The method also includes dispensing the concentrated hair care composition from the mechanical foam dispenser as a dosage of foam; applying the foam to the hair; and rinsing the foam from the hair. The foam has a density of from about 0.025 g/cm | 12-17-2015 |
20150359727 | Method of Treating Hair with a Concentrated Conditioner - A method of treating the hair including providing a concentrated hair care composition in a dispenser. The concentrated hair care composition includes one or more silicones, perfume, and from about 2% to about 10% high melting point fatty compounds. The method also includes dispensing the concentrated hair care composition from the dispenser, applying the concentrated hair care composition the hair; and rinsing the concentrated hair care composition from the hair. | 12-17-2015 |
20150359728 | Method of Treating Hair with a Concentrated Conditioner - A method of treating the hair including providing a pre-aerated concentrated hair care composition. The pre-aerated concentrated hair care composition includes one or more silicones, perfume, and from about 2% to about 10% high melting point fatty compounds. The method also includes applying the pre-aerated concentrated hair care composition the hair; and rinsing the pre-aerated concentrated hair care composition from the hair. The pre-aerated concentrated hair care composition has a density of from about 0.15 g/cm | 12-17-2015 |