【摘要】 针对线性调频连续波雷达在多目标环境下配对计算复杂度高以及实际中可能产生的频谱重叠问题,文中提出一种变周期三角波结合恒频连续波的调制方式。通过对差频信号进行频域恒虚警检测,结合Chirp-Z变换高效地进行频率估计;配合高效的频谱配对算法,利用恒频波段和三角波段对虚假目标进行两次筛选,结合改进的容差函数高效地完成对虚假目标的去除。通过仿真实验验证了该配对算法的高效性,该方法能够显著降低频谱配对次数。更多还原

【Abstract】 As the LFMCW(linear frequency modulation continuous wave)radar has high complexity of pairing calculation in multi-target environment and may produce the spectrum overlap in practice,a modulation method combining variable period triangular wave and constant frequency continuous wave is proposed. The difference frequency signals are subjected to frequencydomain CFAR(constant false alarm rate)detection,and then Chirp-Z transform is combined to perform frequency estimation efficiently. In combination with efficient spectrum pairing algorithm,the false target is filtrated twice with the constant frequency band and triangle band. The false targets are removed efficiently in combination with the improved tolerance function. A simulation experiment was performed. The simulation results show that the algorithm is efficient and can reduce the frequency of spectrum pairing significantly.更多还原