基于压缩感知的扩频信号统一捕获技术  

Unified Acquisition Technology of Spread Spectrum Signal Based on Compressed Sensing

作　　者：王凯 吴斌[1] 汪勃[1] WANG Kai;WU Bin;WANG Bo(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094

出　　处：《无线电工程》2018年第5期378-385,共8页Radio Engineering

基　　金：航天装备"十三五"预研基金资助项目(30507010301)

摘　　要：为了应对不同的任务模式,新的测控体制不断涌现,多体制信号捕获技术成为研究热点。直接序列扩频和跳频扩频是当前扩频测控系统中最常见的2种信号体制,二者之间存在一定的差异,采用现有的接收设备会存在实时性受限、载荷负担重和采样压力大等问题。在基于压缩感知原理的直扩、跳频捕获技术的基础上,构建了压缩感知扩频统一捕获接收框架,利用不同的稀疏矩阵、观测矩阵和捕获算法作为参数对不同体制的信号进行表达,实现信号捕获。统一捕获实现过程运用复用、优化的设计思路,节省了逻辑资源,降低了算法复杂度。仿真分析表明,提出的统一接收框架能有效地捕获接收扩频信号,相较于软件重载的捕获方法在对信号捕获的实时性上具有更加优异的性能。In order to cope with different mission patterns,the new measurement and control systems emerge constantly.The multisystem signal acquisition technology has become a research hotspot.The direct-sequence spread spectrum(DSSS)and the frequencyhopping spread spectrum(FHSS)are the two most common systems in the spread spectrum measurement and control system,and there are some differences between them.The existing receiving devices may have such problems as real-time limitation,heavy burden of the loads and massive pressure of sampling.On the basis of the research on acquisition technology of DSSS and FHSS signals based on compressed sensing theory,this paper proposes a unified acquisition methods for spread spectrum signals,which uses different sparse matrices,observation matrices and acquisition algorithms as parameters to express different systems signals,and finally achieve signal acquisition.The simulation results show that the proposed method can effectively capture the spread spectrum signal,and it has more excellent performance in real-time signal acquisition,compared with the software overloading method.

关 键 词：压缩感知 航天测控 直接序列扩频信号 跳频扩频信号 统一信号捕获 

分 类 号：TN911[电子电信—通信与信息系统]