Rice衰落下MTCM的状态一符号序列译码方法  

State-Symbol Sequence Decoding for MTCM over Rician Fading Channels

作　　者：杨程[1,2] 王树彬[1,2] 邹卫霞[1,2] 周正[1,2] 

机构地区：[1]北京邮电大学无线网络实验室,北京100876 [2]泛网无线通信教育部重点实验室,北京100876

出　　处：《北京邮电大学学报》2008年第5期25-29,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60432040；60772021);北京市自然科学基金项目(4052021);教育部博士点基金项目(20060013008；20070013629);韩国仁荷大学IT研究中心项目(INHA UWB-ITRC)

摘　　要：提出了一种Rice信道中利于译码检测的多网格编码调制(MTCM)设计方法及其译码算法——状态一符号序列译码.利用通常的Viterbi算法对MTCM符号序列进行最大似然译码非常复杂.基于MTCM符号序列设计上的特点。将译码过程分为状态序列检测和符号序列译码两步.符号序列的译码输出不必等到所有符号接收完毕.译码时延小;对于经过衰落信道后的MTCM符号序列,译码性能可以通过改变设计参数值来逼近最大似然算法,理论分析和仿真结果说明了这一特点.A multiple-trellis-coded-modulation （MTCM） symbol sequence design method for Rician channels as well as its corresponding decoding algorithm, state-symbol sequence decoding, are pro- posed. The complexity of maximum likelihood detection algorithm, such as general Viterbi algorithm for MTCM, is very high. Based on the design characters of MTCM, an applicable decoding algorithm is presented： first, the state sequence of MTCM is determined, and then the symbol sequence between two successive determined states is decoded. With this algorithm, it is not necessary for the decoding output to wait for until the whole symbol sequence is received, that will lead to an acceptable short decoding delay. For MTCM symbol sequences suffering from wireless fading, the decoding performance can approximate that of the maximum likelihood decoding algorithm by changing one parameter. Theoretic analysis and simulation can prove the proposed.

关 键 词：RICE信道 多网格编码调制 状态-符号序列译码 

分 类 号：TN929.53[电子电信—通信与信息系统]