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| Number | Title | Issue Date |
| 8181085 | Method and system for providing short block length low density parity check (LDPC) codes in support of broadband satellite applications An approach is provided for encoding short frame length Low Density Parity Check (LDPC) codes. An encoder generates a LDPC code having an outer Bose Chaudhuri Hocquenghem (BCH) code. Structure is imposed on the LDPC codes by restricting portion part of the parity ch... | 05/15/2012 |
| 8145980 | Method and system for decoding low density parity check (LDPC) codes An approach is provided for transmitting messages using low density parity check (LDPC) codes. Input messages are encoded according to a structured parity check matrix that imposes restrictions on a sub-matrix of the parity check matrix to generate LDPC codes. The L... | 03/27/2012 |
| 8144801 | Satellite communication system utilizing low density parity check codes An approach for reliably communicating over a satellite in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) cod... | 03/27/2012 |
| 8140931 | Method and system for generating parallel decodable low density parity check (LDPC) codes An approach is provided for efficiently decoding low density parity check (LDPC) codes. A plurality of parallel processors decode the LDPC codes mapped by accessing a mapped matrix in a memory structure. The mapped matrix is constructed based on a parity check matri... | 03/20/2012 |
| 8102947 | Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes An approach is provided for bit labeling of a signal constellation. A transmitter generates encoded signals using, according to one embodiment, a structured parity check matrix of a Low Density Parity Check (LDPC) code. The transmitter includes an encoder for transf... | 01/24/2012 |
| 8095854 | Method and system for generating low density parity check codes An approach for generating a structured Low Density Parity Check (LDPC) codes is provided. Structure of the LDPC codes is provided by restricting a certain part of the parity check matrix to be lower triangular, hence enabling a very simple encoding method that does... | 01/10/2012 |
| 8069393 | Method and system for providing long and short block length low density parity check (LDPC) codes An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For 1/3 rate, the relevant parameters are as follows: q=120, nldpc=64,800, kldpc | 11/29/2011 |
| 8028224 | Method and system for providing short block length low density parity check (LDPC) codes An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a short LDPC code by shortening longer mother codes. The short LDPC code has an outer Bose Chaudhuri Hocquenghem (BCH) code. According to another aspect, for an L... | 09/27/2011 |
| 7962830 | Method and system for routing in low density parity check (LDPC) decoders An approach is provided for decoding a low density parity check (LDPC) coded signal. Edge values associated with a structured parity check matrix used to generate the LDPC coded signal are retrieved from memory. The edge values specify the relationship of bit nodes ... | 06/14/2011 |
| 7954036 | Method and system for providing low density parity check (LDPC) encoding An approach is provided for a method of encoding structure Low Density Parity Check (LDPC) codes. Memory storing information representing a structured parity check Matrix of Low Density Parity Check (LDPC) codes is accessed during the encoding process. The informati... | 05/31/2011 |
| 7925963 | Sets of rate-compatible universal turbo codes nearly optimized over various rates and interleaver sizes A method and apparatus for Turbo encoding uses a set of rate-compatible Turbo Codes optimized at high code rates and derived from a universal constituent code. The Turbo Codes have rate-compatible puncturing patterns. The method comprises: encoding a signal a... | 04/12/2011 |
| 7907641 | Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme An approach is provided for supporting signal acquisition and frame synchronization in a digital broadcast system utilizing Low Density Parity Check (LDPC) codes. Hierarchical modulation is utilized to provide backward compatibility, whereby the lower layer signal i... | 03/15/2011 |
| 7864869 | Satellite communication system utilizing low density parity check codes An approach for reliably communicating over a satellite in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) cod... | 01/04/2011 |
| 7856586 | Method and system for providing short block length low density parity check (LDPC) codes in support of broadband satellite applications An approach is provided for encoding short frame length Low Density Parity Check (LDPC) codes. An encoder generates a LDPC code having an outer Bose Chaudhuri Hocquenghem (BCH) code. Structure is imposed on the LDPC codes by restricting portion part of the parity ch... | 12/21/2010 |
| 7817759 | Method and apparatus for providing carrier synchronization in digital broadcast and interactive systems An approach is provided for supporting carrier synchronization in a digital broadcast and interactive system. A carrier synchronization module receives one or more signals representing a frame that includes one or more overhead fields (e.g., preamble and optional pi... | 10/19/2010 |
| 7770089 | Method and apparatus for providing reduced memory Low Density Parity Check (LDPC) codes An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For a rate 3/5 code, the approach provides a degree profile that yields reduced memory requiremen... | 08/03/2010 |
| 7672285 | Method and apparatus for minimizing co-channel interference by scrambling An approach is provided for minimizing co-channel interference in a communication system is disclosed. Non-header portions of frames, which are transmitted over the communication system, are scrambled according to respective different scrambling sequences. The above... | 03/02/2010 |
| 7577207 | Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes An approach is provided for bit labeling of a signal constellation. A transmitter generates encoded signals using, according to one embodiment, a structured parity check matrix of a Low Density Parity Check (LDPC) code. The transmitter includes an encoder for transf... | 08/18/2009 |
