基于双互信息准则的雷达自适应波形设计方法

Adaptive Radar Waveform Design Based on Dual Mutual Information Criterion

自适应波形优化技术是认知雷达的关键技术之一,通过优化发射波形能够提高雷达系统性能.针对目标检测问题,在杂波环境下,提出一种基于双互信息优化准则的自适应波形优化方法.该方法同时以接收信号与目标冲激响应之间的互信息最大和接收信号与杂波冲激响应之间的互信息最小为优化准则,在发射信号能量有限的约束条件下,建立优化模型,通过最大边缘分配算法求解最优波形.仿真结果表明,相对于固定波形,所提方法优化发射波形能够提高目标检测性能.

Adaptive waveform optimization technology is one of the key technologies of cognitive radar,which can improve the performance of radar systems.For the target detection,an adaptive waveform design method based on dual mutual information(DMI)criterion was proposed in the clutter environment.The mutual information(MI)was maximized by the proposed method between the received signal and the target impulse response while the mutual information could be minimized between the received signal and clutter impulse response.With the transmitted signal energy constraint,the optimization model for optimal waveform was established,and the optimal waveform was solved by the maximum marginal allocation algorithm(MMA).The simulation results demonstrate the validation of the proposed method.