高动态低信噪比下信号接收机捕获算法研究  

Research on Signal Receiver Acquisition Algorithm under High Dynamic and Low Signal-to-Noise Ratio

作　　者：赵星[1] ZHAO Xing(th Research Institute of China Electronics Technology Corporation,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036

出　　处：《数字通信世界》2024年第5期43-44,135,共3页Digital Communication World

摘　　要：为提升高动态低信噪比下信号接收机的信号捕获精准性,文章从经典数字匹配滤波算法出发,研究了基于频域划分和基于FFT的捕获算法。考虑到伪码多普勒引起的伪码频偏随时间积累的伪码相偏效应,文章提出了伪码频偏的估计与补偿方法,其中包括基于不确定域划分的并行捕获方法和直接估计伪码频偏的方法,以减小伪码相位偏移对信号捕获的影响。研究减少剩余伪码相偏效应的伪码捕获算法,进一步提高信号接收机在高动态低信噪比环境下的性能,为提升扩频接收机在复杂场景中的应用性能提供支持。In order to improve the signal capture accuracy of signal receivers under high dynamic and low signal-to-noise ratio,this article starts from the classic digital matching filtering algorithm and studies capture algorithms based on frequency domain partitioning and FFT.Considering the accumulation of pseudocode phase offset caused by pseudocode Doppler over time,this article proposes an estimation and compensation method for pseudocode frequency offset.This includes parallel capture methods based on uncertain domain partitioning and direct estimation of pseudocode frequency offset to reduce the impact of pseudocode phase shift on signal acquisition.Research on pseudocode capture algorithms to reduce residual pseudocode phase bias effects,further improving the performance of signal receivers in high dynamic and low signal-to-noise ratio environments,and providing support for improving the application performance of spread spectrum receivers in complex scenarios.

关 键 词：高动态 低信噪比 信号接收机 信号捕获 

分 类 号：TN914.42[电子电信—通信与信息系统]