APPARATUS AND METHOD FOR MAPPING AND INVERSE MAPPING OF SIGNALS IN COMMUNICATION SYSTEM USING LOW-DENSITY PARITY-CHECK CODE Russian patent published in 2016 - IPC H03M13/11 

FIELD: physics.

SUBSTANCE: in the present method, bits of a LDPC codeword are written in columns and read in rows; sub-streams are generated by demultiplexing read bits using a demultiplexing scheme, and bits included in each of the sub-streams are mapped into symbols in a group of signals, wherein the demultiplexing scheme is defined in accordance with the modulation scheme used in the signal transmitter, the length of the LDPC codeword and the number of sub-streams.

EFFECT: minimising QAM symbol error probability.

12 cl, 22 dwg