维特比均衡算法  

Viterbi Equalization Algorithm

作　　者：孔德廷[1] 伍守豪[2] 金涛[2] 张义德[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都611731 [2]深圳清华大学研究院EDA实验室,广东深圳518000

出　　处：《通信技术》2010年第9期27-29,共3页Communications Technology

摘　　要：基于符号级维特比译码算法,将信道等效为一时变卷积编码器,提出了一种将信道均衡和信道译码相结合的技术——维特比均衡。重点研究了采用维特比均衡技术的单载波系统,并对比给出了采用频域均衡技术和维特比均衡技术,系统误码性能随信噪比的变化曲线及系统的计算复杂度。仿真结果表明:信道的等效脉冲响应滤波器长度较长时,维特比均衡技术明显改善了系统的误码性能,然而系统的复杂度也随之增加。Based on symbol Viterbi algorithm and in considering the channel with inter-symbol interference as a convolutional encoder,this paper proposes a Viterbi equalization a technique in combination of channel decode with channel equalization.This article analyzes and compares the curves of BER vs SNR and the computational complexity of single carrier systems with frequency-domain equalizer and Viterbi equalization.Simulation results indicate that,when the length of the equivalent channel impulse response filter is long,the BER performance of the system is remarkably improved by Viterbi equalization,while the system complexity is accordingly enhanced.

关 键 词：维特比译码 维特比均衡 频域均衡 卷积编码 码间干扰 

分 类 号：TN911.22[电子电信—通信与信息系统]