MSK信号低运算量相干多符号检测算法  

MINIMUM SHIFT KEYING SIGNAL LOW COMPUTATION COHERENT MULTI-SYMBOL DETECTION ALGORITHM

作　　者：黄诚 谢锡海 张雯雯 Huang Cheng;Xie Xihai;Zhang Wenwen(School of Communication and Information Engineering,Xi'an University of Posts and Telecommunications,Xi'an 710121,Shaanxi,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《计算机应用与软件》2022年第9期321-325,331,共6页Computer Applications and Software

摘　　要：针对最小频移键控(Minimum Shift Keying,MSK)信号相干多符号检测运算量大的问题,提出一种低运算量的改进算法。将本地信号按待检测位置码元的不同分为两类,仅取其中一类本地信号与接收信号进行匹配相关运算,利用得到的最大相关值或者最小相关值进行判决输出,为了保证判决的正确,采用阈值对相关结果进行限定,该算法与相干多符号检测算法相比在不同观测长度下运算量分别降低了一半。仿真结果表明,改进相干多符号检测算法与多符号检测算法相比,虽然误码率为10^(-4)时有0.1 dB性能损失,但误码率为10^(-2)时有0.19 dB的性能提升,与现有常用的MSK信号检测算法相比,误码率为10^(-4)时仍至少有1.5 dB性能提升。Aiming at the problem that minimum shift keying(MSK)signal coherent multi-symbol detection requires a large amount of computation,an improved method with low computation is proposed.The local signals were divided into two types according to the position symbols to be detected.Only one of the local signals and the received signals were matched and correlated,and then the maximum correlation value or the minimum correlation value obtained was used for decision output.In order to ensure the correctness of the decision,the threshold value was used to limit the correlation result.Compared with the coherent multi-symbol detection algorithm,the calculation amount was reduced by half under different observation lengths.Simulation results show that,compared with the multi-symbol detection algorithm,the improved algorithm has a performance loss of 0.1 dB when the bit error rate is 10^(-4),but a performance improvement of 0.19 dB when the bit error rate is 10^(-2).Compared with other existing MSK signal detection algorithms,the improved algorithm still has a performance improvement of at least 1.5 dB when the bit error rate is 10^(-4).

关 键 词：最小频移键控信号 多符号检测 相干检测 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术] TN911.3[电子电信—通信与信息系统]