Protograph LDPC-based distributed joint source-channel coding

Abstract

This paper proposes a distributed joint source-channel coding (DJSCC) scheme using a single protograph low-density parity-check (P-LDPC) code for the symmetric problem. In the proposed scheme, the distributed source encoder sends the uniformly-spaced information bits together with the parity bits to simultaneously achieve both distributed compression and channel error correction. Moreover, iterative joint decoding is introduced to further exploit the source correlation. Simulation results show that the proposed DJSCC scheme can obtain relatively large additional coding gains and guarantee that the distributed source shows almost the same performance, which is suitable for equal error protection applications.