Joint iterative decoding for LDPC‐coded multi‐relay cooperation with receive multi‐antenna in the destination

Abstract

This study proposes an low density party check (LDPC)-coded multi-relay cooperation with receive multi-antenna in the destination over a Rayleigh-fading channel, where maximal ratio combining and belief propagation algorithm (BP)-based joint iterative decoding based on the introduced multi-layer Tanner graph are effectively designed to detect and decode the corrupted received sequence at the destination. The overall code rate from the destination is derived mathematically in relation to all the constituent LDPC codes employed by source and multiple relays. Theoretical analysis and numerical simulation show that the proposed approach can well combine diversity and coding gains, which consequently result in significant advantage over the conventional cooperations under the same conditions.