Patent ID: 11894861
Assignee: PANASONIC HOLDINGS CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A reception method comprising:
receiving a transmission signal through an antenna;
generating constellation words based on the transmission signal, the constellation words each consisting of M bits;
generating a codeword by concatenating the constellation words, the codeword including N×Q bits;
reordering bits in the codeword;
reordering N bit groups after the bits in the codeword are reordered, without reordering the bits within each N bit group;
reordering a parity portion of the codeword after the N bit groups are reordered without reordering the bits within each N bit group; and
decoding bits of the codeword according to a low-density parity check coding scheme after the N bit groups are reordered, a parity-check matrix of the low-density parity check coding scheme having a quasi-cyclic structure, wherein
N is not a multiple of M, X is a remainder of N divided by M, and N′ is equal to N-X, and
bits of the N′ bit groups are written into an M by N matrix column-by-column and the written bits of the N′ bit groups are read from the M by N matrix row-by-row in order to reorder the bits in the codeword.