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针对杂波背景下对认知多输入多输出(MIMO)雷达波形设计研究较少的问题,提出了一种基于最大互信息准则的波形设计方法。该方法结合一般认知雷达波形设计模型,以雷达发射功率作为约束条件,以最大化目标与接收回波间的互信息为目标,对认知MIMO雷达的波形设计问题进行建模,并采用卡尔曼滤波一步预测的方法对快速运动扩展目标的冲激响应进行预测,实现对目标的精准估计;同时,基于上述分析采用最大能量分配的方法进行波形设计。仿真实验表明,与传统的线性调频信号(LFM)相比,文中所提方法可以获得更多的信息量。
Aiming at the problem of less research on the waveform design of cognitive multiple input multiple output (MIMO) radar under clutter background, a waveform design method based on maximum mutual information criterion is proposed. This method combined with the general cognitive radar waveform design model, with the radar transmitting power as the constraint condition, and the maximization of the mutual information between the target and the received echo as the goal, to model the waveform design of cognitive MIMO radar, Man filter prediction method to predict the impulse response of the fast moving target and achieve the accurate target estimation. At the same time, the maximum energy distribution method is used to design the waveform based on the above analysis. Simulation results show that compared with the traditional LFM, the proposed method can obtain more information.