基于伴随式的分布式联合信源信道编码

Syndrome-based distributed joint source-channel coding scheme

提出一种基于伴随式(Syndrome)的具有抗差错性能的分布式联合信源信道编码方案.在不增加编码端复杂度的前提下,设计一种新的基于伴随式的编码器,使其同时具有压缩和抗差错的性能;其次,设计相应的译码器,并改进现有的联合译码算法,在译码中引入新的信息交互过程,提高了译码性能.仿真结果表明:该方案的性能优于现有的基于伴随式的分布式联合信源信道编码方案的性能,而且在信噪比较高时,该方案的性能也优于基于校验位(Parity)的分布式联合信源信道编码的性能.

A syndrome-based error resilient scheme of distributed joint source-channel coding was addressed.Without increasing the complexity of the encoder,a new appropriate syndrome based encoder with compression and error resilient capability were designed.Secondly,a corresponding decoder was designed and the existing joint decoding algorithm was improved,introducing a new information exchange,to improve the performance of the decoder.Simulation results show that the performance of the proposed scheme is better than that of the existing syndrome-based distributed joint source-channel coding scheme in the noisy channel and the performance of the scheme is also better than that of the parity-based distributed joint source-channel coding when the signal to noise ratio（SNR） is high.