一种抗误码能力强的无线信道图像传输方案  

A robust coding scheme for image transmission over wireless channels

作　　者：顾炜[1] 胡波[1] 凌燮亭[1] 

机构地区：[1]复旦大学电子工程系CAT室,上海200433

出　　处：《通信学报》2002年第6期97-104,共8页Journal on Communications

基　　金：复旦大学科学技术青年基金资助项目(EX86301)

摘　　要：本文提出一种新的综合源编码和信道编码的无线信道图像传输方案,对于波变换后各个子带采用基于统计特性的变系数定长（VCFL）编码,数据经过Reed-Solomon编码后选择不同码率的码率兼容删除卷积码（RCPC）编码以提供不同程度的差错保护（UEP）,最后数据经交织后传输。在给定传输的总比特数的情况下,通过优化算法使总体失真最小。模拟结果表明新方案在无线衰落信道上表现出良好的性能。A new joint source-channel coding scheme is proposed for wavelet-based image transmission over wireless channels. For each subband, the statistical variable-coefficient fixed-length (VCFL) coding algorithm and Reed-Solomon codes are applied, then different rate-compatible punctured convolutional(RCPC) code is used to provide unequal error protection (UEP), finally before transmission an interleaver is used. Given the total transmission bits, an optimal algorithm is used to minimize the total distortion. Simulation results show that the proposed scheme performs well on wireless fading channels.

关 键 词：抗误码 无线信道 图像传输 变系统定长编码 差错保护 无线衰落信道 Reed-Solomon编码 

分 类 号：TN919.8[电子电信—通信与信息系统]