宽带跳频信号的后验压缩采样技术研究.pdfVIP

112 2012 ,48(7) Computer Engineering and Applications 计算机工程与应用 宽带跳频信号的后验压缩采样技术研究 吴剑锋1 ，汪立新1·2 ，陈宇科1 l WU Jianfeng WANG Lixin l.2, CHEN Yuke 1.杭州电子科技大学通信工程学院，杭州 31∞18 2通信系统信息控制技术国家级重点实验室，浙江嘉兴 314∞1 1.School ofCommunication Engineering, Hangzhou Dianzi Univers坷， Hangzhou 31∞18， China 2.National Key Laboratory of lnfonnation Control Technology for Communication System, Jiaxing , zh哥iang 314001 , China WU Jlanfe吨， WANG Llxln , CHEN Yuke. Research on posterlori compressive sampHng using wideband frequency-hopping slg- nals. Computer Englneering and Applications ,2012 ,48(7): 112-114. Abstract: Ultrahigh speed ADC (Analog to Digital Converter) sampling and fixed-仕equency signal separation are long-standing prob- lems for the wideband and non-c∞perative frequency hopping signal in passive location. Ac哩。rding to compressed sampling theory, an- alog information can be converted inωdigital information with far less than the Nyquist sample rate for some wideband signals ar冒 sparse in expression dictionary. However, saJ;Ilpling information that signal reconstruction needs increases sharply when multiple fixed-企equency signals exist, which brings tremendous complexity for AIC (Analog to Infonnation Converter) module of distributed sensor system. Fixed-仕叫uency interference AIC infonnation ofthe target frequency band can be filtered out based on subspace p叫ec­ tion. Simulation results show that the method is feasible. Key words: wideband 企equency hopping; compressive sampling; fixed frequency signal suppression; Analog to Infonnation Convert町 摘 要:在对宽频段的非合作跳频信号进行无源定位场合，超高速数模转换(ADC)采样和各种定频信号的分离已经成为瓶颈. 根据压缩采样理论，对于在某些表达基上为稀疏的宽频段信号，可以用.i低于Nyquist 门限的采样率来进行模拟信息转换(AIC) ， 但是对于有多个定频信号存在的情况，信号重建需要的信息样点数陡然增加，这给分布式传感器系统中的AIC部分的实现带来 极大的复杂度.基于子空间投影技术，提出了一种能抑制目标频带内定频千扰信号的跳频信号模拟压缩采样方法，仿真结果表 明该方法是可行的. 关键词:宽带跳频;压缩采样;走频抑制;模拟信息转换(AIC) DOI: 10.3778/j .issn.l002-833 1.2012.07.029 文章编号: 1002-833