摘要
连续相位调制信号的差分检测性能随码间干扰增大而恶化,为了改善误比特性能,提出了基于判决反馈的多分支分数多比特差分检测技术。通过在多分支分数比特区间差分信号中引入判决反馈,合并后判决,使得严重的码间干扰得以抵消。理论分析与仿真结果表明,与无判决反馈的多分支分数多比特差分检测相比,所提出的结构可以获得较大的性能改善;在避免载波恢复的前提下误比特性能更加接近相干检测的性能。
Differential detection of continuous phase modulation suffers from significant intersymbol interference.To improve the bit error rate performance,multi-branch fractional multi-bit differential detection with decision feedback is proposed.By introducing decision feedback in multi-bit differential detected signals,severe intersymbol interference can be removed.Simulation results show that the proposed structure can provide great improvement,and the best performance is achieved which is very near to the performance of the coherent detection.
出处
《重庆邮电大学学报（自然科学版）》
北大核心
2011年第3期276-280,共5页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(60902039)
高等学校学科创新引智计划基金(B08038)~~
关键词
连续相位调制
差分检测
分数多比特差分检测
判决反馈
continuous phase modulation（CPM）
differential detection
fractional multi-bit differential detection
decision feedback
