一种 MIMO 雷达谱修正旁瓣抑制方法的研究

摘要

In the narrowband frequency division MIMO radar system,the bandwidth of the receiver is restricted by radar system,and the frequency division orthogonal signal is transmitted,so the bandwidth of subband signal is small,which leads to a small time-bandwidth product.The signal thus has a great range sidelobe.A method is proposed to suppress the range sidelobe by use of the spectra modification technique. The comprehensive output signal from the MIMO radar echoes after matched filtering and beam forming is processed using the spectra modification.The computer simulation and experiment results of the actual an-tenna array demonstrate that the algorithm can suppress the range sidelobe of the MIMO radar effectively.%在窄带频分 MIMO 雷达系统中，由于接收机带宽受雷达系统的限制，而 MIMO 雷达发射频分的正交信号，所以子带信号带宽较小，从而导致信号时带积变小，因此信号具有较大的距离旁瓣。针对 MI-MO 雷达信号旁瓣高的问题，提出了一种采用谱修正技术抑制 MIMO 雷达距离旁瓣的方法。将 MIMO 雷达回波信号经过波束形成和匹配滤波后的综合输出信号频谱进行谱修正处理，计算机仿真和对实测数据的处理证明，这种方法能有效地抑制 MIMO 雷达的距离旁瓣。