A network controller receives data substantially simultaneously from multiple client nodes. The network controller assigns to each client node one or more sub-carriers of an orthogonal frequency-division multiplexing access frequency spectrum. The client nodes transmit substantially simultaneously M LDPC codewords that are encoded in a parity check matrix so that the number of rows m' depend on the code rate and are mapped on its assigned sub-carriers. The network controller computes a bit log-likelihood ratio for each received bit of the codewords and arranges the bit LLR by codeword to align with an equivalent parity check matrix. The network controller decodes the codewords with the equivalent parity check matrix.
申请公布号
WO2010068616(A1)
申请公布日期
2010.06.17
申请号
WO2009US67083
申请日期
2009.12.08
申请人
ENTROPIC COMMUNICATIONS, INC.;YUAN, SHAW;MUELLER, ARNDT;EIDSON, BRIAN