Abstract: Apparatus, and an associated method, for designing codes to be used to code data that is communicated in a multi-access communication system. A selected code is designed, based upon an initial code. The selected code that is designed is of characteristics that best optimize channel differentiation to minimize interference between concurrently-communicated data coded by different codewords of the selected code.

Abstract: System and method for designing Slepian-Wolf codes by channel code partitioning. A generator matrix may be partitioned to generate a plurality of sub-matrices corresponding respectively to a plurality of correlated data sources. The partitioning may be performed in accordance with a rate allocation among the plurality of correlated data sources. A corresponding plurality of parity matrices may then be generated based respectively on the sub-matrices, where each parity matrix is useable to encode correlated data for a respective correlated data source.

Abstract: System and method for Slepian-Wolf coding using channel code partitioning. A generator matrix is partitioned to generate multiple sub-matrices corresponding respectively to multiple correlated data sources. The partitioning is in accordance with a rate allocation among the correlated data sources. Corresponding parity matrices may be generated respectively from the sub-matrices, where each parity matrix is useable to encode correlated data for a respective correlated data source, resulting in respective syndromes, e.g., in the form of binary vectors. A common receiver may receive the syndromes and expand them to a common length by inserting zeros appropriately. The expanded syndromes may be vector summed (e.g., modulo 2), and a single channel decoding applied to determine a closest codeword, portions of whose systematic part may be multiplied by respective submatrices of the generator matrix, which products may be added to the respective expanded syndromes to produce estimates of the source data.

Abstract: Transmission of data from a base station to a set of users is improved by implementing an OFDM system as a CDMA system in which complex spreading codes are applied to the individual data in the transmitter and the receiver is a CDMA receiver.