准循环LDPC码的性能及其在图像传输中的应用  

The Performance of Quasi-cyclic LDPC Codes and its Application in Image Transmission

作　　者：钟竞东[1] 梁钊[1] 

机构地区：[1]五邑大学信息学院,广东江门529020

出　　处：《电子科技》2006年第2期47-50,共4页Electronic Science and Technology

摘　　要：介绍了LDPC码及其编译码原理,并对准循环LPDC码进行了性能仿真。结果表明,该码在中短码长时具有很强的纠错能力,将其应用于图像传输中,译码时以较少的迭代次数便能达到很好的传输质量。由于LDPC码性能优异,编译码比Turbo码较为简单,易于实现,故在未来的高速率、多媒体通信中可望得到广泛应用。This paper describes LDPC codes and their encoding and decoding principles. The performance of Quasi-cyclic LDPC codes is simulated and the result shows that QC LDPC codes have good error correcting ability at moderate or short length. When applied in image transmission, the polluted image can be completely recovered with only a few iterations. Compared with Turbo codes, QC-LDPC codes have better performance and are easier to implement. They are, therefore, expected to be widely applied in the future high speed multi-media communications.

关 键 词：准循环LDPC码 二部图 和-积算法 图像传输 

分 类 号：TN919.81[电子电信—通信与信息系统]