基于MLSE的新型分数间隔均衡研究

针对GMSK调制通信系统中,传统MLSE均衡技术存在的对定时偏差较为敏感的问题,给出一种新型的分数间隔均衡方案.该方案的算法结构并不是传统的匹配滤波加白化滤波器的结构,而是基于改进型Viterbi算法(MVA).该方案较好地解决了传统MLSE均衡对定时偏差敏感的问题.仿真分析表明,相比于传统的MLSE均衡,所提出的分数间隔均衡方案可以有效地改善均衡效果,同时在同频干扰下性能优良.

A MLSE based new fractionally spaced equalization scheme

This paper studies a new fractionally spaced equalization scheme to solve the problem of timing offset existing in the traditional MLSE equalization technology,in GMSK modulated system.The algorithm structure of this scheme is not based the traditional structure which include a matched filter,a whitening filter,but based on the improved Viterbi algorithm (MVA).This new scheme gives a better solution to the problem of timing offset sensitivity faced by the traditional MLSE equalization.The simulation analysis shows that,compared to the traditional MLSE,this novel fractionally spaced equalization scheme proposed in the paper can effectively improve the equalization effect,enhance the system performance and show better results under co-channel interference.