一种基于先验信息的机载MIMO雷达发射方向图设计方法
doi: 10.11999/JEIT140911
A Beampattern Design Method for Airborne MIMO Radar Based on Prior Information
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摘要: 在非均匀杂波背景下，针对旁瓣杂波抑制问题，该文提出一种基于先验信息的机载多输入多输出(MIMO)雷达发射方向图设计方法。该方法利用目标和杂波在空域和多普勒域的2维先验信息，以最大化雷达空时匹配滤波后的输出信杂噪比(SCNR)为准则，建立关于发射信号相关矩阵的优化代价函数，并采用半正定规划(SDP)方法进行求解。仿真表明，在非均匀杂波背景下，采用该文方法优化设计的发射方向图可有效提高空时2维匹配滤波后的输出信杂噪比。Abstract: A beampattern design method for the airborne Multiple Input Multiple Output (MIMO) radar based on the prior information is proposed to suppress the sidelobe clutter in the non-homogeneous clutter environment. Using the two Dimensional (2D) prior information of the target and clutter in the spatial and Doppler domain, the cost function for the correlation matrix of the transmission waveform is established by employing the maximum output Signal-to-Clutter-plus-Noise Ratio (SCNR) criterion after the space-time matched filter and it can be solved by the Semi-Definate Programming (SDP). The simulation results indicate that the transmission beampattern optimized by the proposed method is able to increase effectively the SCNR output after the space-time 2D matched filter in the non-homogeneous clutter environment.
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