信号相关杂波环境中的认知雷达检测波形设计  

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401教研室,合肥230037

出　　处：《现代雷达》2013年第11期35-38,43,共5页Modern Radar

摘　　要：研究了信号相关杂波环境中的认知雷达检测波形设计问题,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。由仿真结果可知,所设计波形的检测性能优于传统的恒包络LFM波形。当采用多组初始波形进行迭代优化时,检测概率趋向于相同值,结果表明该算法的收敛性良好。In the presence of signal-dependent clutter, the problem of detecting waveform 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, we optimize the transmitted waveform and the receiver filter jointly 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 waveform is better than that of the LFM waveform which is used widely in traditional radar. When we use different initial waveform to solve the optimization problem, the probability of detection after several iterations will approach the same value, which indicates that the convergence of the algorithm is great.

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：TN957.51[电子电信—信号与信息处理]