DESIGN OF SHIFT VALUES FOR QUASI-CYCLIC LDPC CODES

摘要

The application relates to the design of parity-check matrices of quasi-cyclic LDPC codes for wireless communications, in particular in the framework of 3GPP 5G or 3GPP New Radio. Base matrices of dimensions 46x68 and 42x52 are provided together with shift coefficients for shift sizes Z=3*2^j, j=0, 1, 2, 3, 4, 5, 6 and 7 and Z=7*2^j, j=0, 1, 2, 3, 4 and 5, respectively. The resulting parity check matrices are optimized according to two or more approximate cycle extrinsic message degree (ACE) constraints.