信号相关杂波环境中的认知雷达稳健检测波形设计  

Robust Detection Waveform Design for Cognitive Radar in the Presence of Signal-Dependent Clutter

作　　者：王鹏[1] 崔琛[1] 张鑫[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《火力与指挥控制》2014年第7期73-77,81,共6页Fire Control & Command Control

摘　　要：研究了认知雷达回波先验信息不充分的情况下,信号相关杂波环境中的认知雷达稳健检测波形设计问题,提出了一种基于NP准则和交替投影法的波形优化算法。在该算法中,根据所推导出的检测概率与发射波形、接收机滤波器之间关系的闭式表达式,通过联合优化发射波形和接收机滤波器,达到提高接收机的检测概率和降低信号相关杂波负面影响的目的。分析仿真结果可知:稳健波形可以提升波形检测系统的动态适应能力,且稳健波形的检测性能优于传统的高斯包络波形和恒包络LFM波形;系统输出的稳健波形显示该系统发射端具有很好的稳健性而接收端则有很好的收敛性。In the presence of signal-dependent clutter and echo priori information insufficiency, the problem of robust detecting waveforrn design for cognitive radar is studied,and an optimization algorithm for solving this problem is proposed based on the NP criterion and alternating projection method. In the proposed algorithm,for improving the detecting performance of cognitive radar and reducing the negative impact of the signal-dependent clutter,the transmitted waveform and the receiver filter jointly is optimized based on the derived closed-form solution of the relationship between the detection probability and the transmitted waveform. The simulation results indicate that the detection performance of the designed robust waveform is better than that of the LFM waveform and Gaussian waveform which is used widely in traditional radar;the same time the dynamic detecting performance of cognitive radar can be improved by the robust waveform. The output of the system robust waveform shows that this system has good robustness of transmitting end and receiving end have good convergence.

关 键 词：认知雷达 波形设计 目标检测 相关杂波 交替投影 

分 类 号：TN958[电子电信—信号与信息处理]