Abstract:

This paper focuses on the joint source-channel decoding algorithm based on Non-binary LDPC code,by source estimation of HMM.Aiming at augmenting the performance,this algorithm improves the conventional decoding algorithm of Non-binary LDPC code by adding source redundancy estimated and modifying the iterative soft information in the iterative process.The result of emulation shows its superiority over conventional methods in AWGN channel.

Key words: hidden markov model;non binary LDPC code;joint source channel decoding