运用压缩感知技术实现雷达侦察告警接收机改进

摘要

Aiming at radar reconnaissance warning receiver front -end acquisition efficiency demand is higher and higher,while high performance sampling quantization precision and sampling rate are limited by the hardware of AD itself,a new radar reconnaissance warning receiver is designed based on compressed sensing signal processing algorithm (CS).This program first acquisition compressed signal directly with compression perception technology;then sampling by low speed AD;and reconstructing signal with nonlinear iterative finally. Compressed signals can complete the analog-to-digital conversion with low speed;the sufficiency of the AD application is improved greatly. Stimulation results show that the requirement of large signal instantaneous bandwidth and dynamic range of signal acquisition can be content well and this new radar reconnaissance warning receiver transfer the operation to the subsequent signal processing,greatly light the radar front-end with prefect operability and application prospect.%针对雷达侦察告警接收机前端信号采集效率要求越来越高,而高性能采样的量化精度和采样速率受AD自身硬件限制的突出问题,在压缩感知信号处理算法(CS算法)的基础上,根据数字雷达侦察告警接收机设计了一种改进型雷达侦察告警接收机方案.该方案首先用压缩感知技术直接采集压缩后的信号;然后再进行低速AD采样;最后用非线性迭代重构还原信号.压缩后的信号用低速AD即可完成信号的模数转换,极大地提高了AD的应用效率.仿真结果表明,该型雷达侦察告警接收机能很好地满足大瞬时带宽及动态范围信号采集要求,同时将复杂运算移交给后续的信号处理,极大地减轻了雷达侦察告警接收机前端的负荷,具有良好的可操作性和应用前景.