改进的MSK信号循环谱检测算法  

Innovatory detection algorithm of MSK DS-SS signal based on cyclic spectrum

作　　者：郑鹏[1] 张鑫[1] 刘锋[1,2] 陶然[2] 

机构地区：[1]海军航空工程学院电子信息工程系,烟台264001 [2]北京理工大学信息科学技术学院,北京100081

出　　处：《信息技术》2011年第12期1-4,9,共5页Information Technology

基　　金：国家自然科学基金(60232010);国家部委预研资助基金(41001020201)

摘　　要：利用循环谱理论对MSK直接序列扩频信号进行检测,分析了其循环谱包络特征;在有限数据下,为实现更低信噪比情况下信号检测,提出了一种改进算法,该算法基于数据分段处理和重叠保留,通过在非零循环频率上的一维搜索实现检测,能够有效地抑制噪声影响,避免多维搜索,计算量小;文中还分析了算法性能,给出了算法实现的具体步骤,并进行了计算机仿真。仿真结果证明了所提出算法的有效性。The cyclic spectrum theory is applied to detect MSK signal, and the cyclic spectrum amplitude of the signal is analyzed. An innovatory algorithm is proposed to realize detection of the signal in limited data length. The algorithm based on data division and overlap reservation can restrain noise effectively. The detection is realized by searching in non-zero cyclic frequencies, which can reduce the computing time and avoid multi-dimentional search. The performance of the algorithm is analyzed, the procedure is given and the computer simulation test is offered. The simulation results have proved the validity of the method.

关 键 词：MSK信号 循环谱 检测 改进算法 

分 类 号：TN911[电子电信—通信与信息系统]