一种基于通道相位线性分析的直扩信号检测算法  

A Method of Detection for DSSS Signal based on Channel Phase Linearity Analysis

作　　者：徐哲 熊刚[2] XU Zhe;XIONG Gang(Unit 91977 of PLA,Beijing 100001,China;No.30 Institute of CETC,Chengdu Sichuan 610041,China)

机构地区：[1]中国人民解放军91977部队,北京100001 [2]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2021年第11期2484-2489,共6页Communications Technology

摘　　要：直扩信号具有的低功率谱和低工作信噪比的特点,对扩频信号检测算法的研究具有重要意义。基于此,提出了一种基于通道相位线性分析的检测新算法。在对直扩信号的长码与短码模型开展分析的基础上,该算法通过将直扩信号分为多通道接收处理,以及对交叉协方差矩阵相位的线性特征进行计算提取,能够在低信噪比环境中成功检测出信号,且鲁棒性强。此外,该算法适用于长码直扩、短码直扩信号。仿真结果显示该方法的抗噪性好,检测性能优于过去的一些算法,适用性较强。DSSS signal has the characteristics of low power spectrum and low SNR,so the research on its detection algorithm is of great significance.A new detection algorithm based on linear analysis of channel phase is proposed in this paper.Based on the analysis of long code and short code models of DSSS signal,the signal can be successfully detected in low SNR environment by decomposing the DSSS signal into multi-channel receiving processing and calculating and extracting the linear characteristics of cross covariance matrix phase.In addition,the algorithm can be applied for long code DSSS and short code DSSS signals.Simulation results indicate that the new method has good anti-noise performance,better detection performance than some of the previous algorithms,and the applicability is stronger.

关 键 词：直接序列扩频 信号检测 相位响应 交叉协方差 线性特征 

分 类 号：TN918.91[电子电信—通信与信息系统]