| Patent application number | Description | Published |
|---|
| 20080267308 | TRELLIS CONSTRUCTION FOR GROUP CODES - A method and system are used for constructing a minimal BCJR trellis for a block group code. A parity check matrix of a block group code is obtained, as is a generator matrix of the block group code. A root vertex is determined at a first time. Syndromes of the parity check matrix are determined at further times to determine distinct vertices at such further times until a null vector is encountered to obtain a minimal BCJR trellis for the block group code for storing or use in decoding received codes. | 10-30-2008 |
| 20080267322 | SYSTEM AND METHOD FOR TRELLIS CONSTRUCTION FOR GOUP CODES - A method and system constructs a minimal trellis for decoding a block group code. A generator matrix of the code is obtained and converted into a row-reduced echelon matrix form. Vertices are determined from the row-reduced echelon matrix form at a first time. Further vertices at later times are also determined to obtain a minimal trellis for the block group code C for storing or use in decoding received codes. | 10-30-2008 |
| 20080304552 | Receiver for communication system - A receiver includes a channel providing information received from wireless communications, including information from a selected user. A minimum mean square error combiner is coupled to the channel for receiving samples in a symbol duration and minimizes mean square error in such samples. The combiner has coefficients derived from a training sequence. Information of the selected user is extracted from a mixture consisting of information from unintended users, interference and noise. | 12-11-2008 |
| 20090217126 | GENERATION OF TANNER GRAPHS FOR SYSTEMATIC GROUP CODES FOR EFFICIENT COMMUNICATION - A computer implemented method of communicating includes receiving systematic group codes representative of one or more messages. A Tanner graph is used to decode such systematic group codes. A method of forming a communication decoder includes obtaining a dual code for a systematic group code, obtaining a Tanner graph from the dual code, and reducing vertex complexity of the Tanner graph to provide a decoding Tanner graph for the communication decoder. | 08-27-2009 |
| 20100305885 | SYSTEM AND METHOD FOR DETECTING ADULTERATION OF FUEL OR OTHER MATERIAL USING WIRELESS MEASUREMENTS - A method includes transmitting wireless signals toward material in a tank. The method also includes receiving first return wireless signals reflected off a surface of the material and identifying a level of the material in the tank using the first return wireless signals. The method further includes receiving second return wireless signals reflected off a bottom of the tank and determining whether the material has been adulterated using the level of the material in the tank and the second return wireless signals. Determining whether the material has been adulterated could include determining a dielectric constant of the material, determining a density of the material using the dielectric constant of the material, and comparing the determined density of the material against a specified density. Determining the dielectric constant of the material could include using a time between peaks associated with the first and second return wireless signals. | 12-02-2010 |
