SYSTEMS AND METHODS FOR MULTIPLE ACCESS WITH SPARSE CODE Russian patent published in 2016 - IPC H04B7/02 

FIELD: communication.

SUBSTANCE: invention relates to a communication system of multiple access with code division of channels. Besides, multiple access may be achieved by assignment of different code books to various multiplexed layers. Besides, sparse codewords can be used to reduce complexity of processing the main band signal at the receiver side in the network, since the sparse codewords can be detected among the multiplexed codewords in accordance with messages passing algorithms (MPA).

EFFECT: advantage in coding can be achieved by means of encoding binary data directly into multidimensional codewords, that does not need displaying QAM symbols (quadrature amplitude modulation symbols) used in traditional technologies of CDMA-coding.

14 cl, 38 dwg, 3 tbl