Optimized QC-LDPC Coded Cooperation for Single Relay Wireless Cooperative Communication System

Abstract

This literature proposes an optimized design of a coded cooperative system using QC LDPC codes with joint decoding at the destination based on the bilayered Tanner graph. Firstly, the literature first introduces QC-LDPC and its construction method based on exponent matrix and base matrix. Then equivalent parity check matrix was constructed in the destination using the bi-layer Tanner graph for the coded cooperation. The literature implemented the iterative Belief Propagation (BP) algorithm-based decoding method to decode equivalent parity check matrix at the destination. Finally, BER performance analysis was performed. The performance analysis result illustrated that the optimized QC-LDPC coded cooperation has a better performance compared to the non-cooperative coded systems over similar channel conditions.