Abstract: To study the communication cooperating coding of data compression, a joint source channel LDPC coding scheme is proposed, and an iterative decoding relay framework is designed. Firstly, the source node sends the relevant content to the destination node with one relay node, and the LDPC coding of the distributed joint source channel is adopted at the two nodes. Then, the LDPC source code is carried out at the source node based on the matrix operation, and the LDPC channel coding is applied to the relay, and the corresponding codeword is forwarded through the noise channel. Finally, the correlation of residual information and the correlation of source relay are used to provide the best estimate of the source sequence. Experimental results show that compared with other similar relay coding schemes, the proposed scheme has higher bit error rate. For medium and low error probabilities, the performance is robust. When the error probability is below 0.05, the proposed scheme shows similar performance to the error free environment.

Key words: joint source channel, LDPC coding, relay, bit error rate, noise channel

摘要： 为了研究数据压缩的协作通信编码，提出一种联合信源信道的LDPC编码方案，并设计了一种迭代解码的中继框架。首先，源节点借助一个中继节点向目的地节点发送相关内容，并在两个节点处应用分布式联合信源信道的LDPC编码；然后，基于矩阵运算在源节点处进行LDPC源编码，将LDPC信道编码应用于中继处，通过噪声信道将相应的码字转发到目的地；最后，利用剩余信源相关性和信源-中继相关性，提供对信源序列的最佳估计。实验结果表明，与其他类似中继编码方案相比，所提方案在误比特率方面具有较大改善，对于中等和较低的错误概率，性能表现稳健，并且当错误概率低于0.05时，所提方案表现出与无错误环境相似的性能。

关键词: 联合信源信道, LDPC编码, 中继, 误比特率, 噪声信道