信源-信道联合编码/调制中映射方式的优化  

Mapping Optimization for Joint Source-Channel Coding/Modulation

作　　者：鄂一鸣[1] 殷玮玮[1] 吴乐南[1] 

机构地区：[1]东南大学无线电工程系,南京210096

出　　处：《无线通信技术》2007年第1期1-4,9,共5页Wireless Communication Technology

基　　金：国家自然科学基金资助项目(60072013)

摘　　要：在信源-信道联合编码/调制中,通过优化信源和信道调制符号间的映射关系,在端到端均方误差的失真度量标准下,可以得到比传统级联编码系统更好的性能。且通过类似BSA的交换算法求得局部最优映射方式,有更高的重建信噪比,系统复杂度低。By optimizing the mapping scheme between source and channel modulation symbols in a joint source-channel coding/modulation system, under the distortion measurement of end-to-end mean square error, the proposed scheme has better performance than that of the traditional tandem coding system. With the local optimization mapping founded by switch algorithm which is similar to the Binary Switching Algorithm, it can reach higher SNR in reconstruction and lower complexity in system realization.

关 键 词：二进制交换算法 信源-信道联合编码/调制 代价函数 映射 

分 类 号：TN91[电子电信—通信与信息系统]