关键词: 针对有轨电车防撞雷达常用直接矩阵求逆法进行信号检测, 复杂度高, 运算量大的问题, 通过分析有轨电车防撞雷达系统运行过程中周围杂波、干扰和噪声的特征, 将共轭梯度法匹配滤波器应用于有轨电车的防撞雷达信号检测, 不仅获得CFAR最优检测器, 还比直接矩阵求逆法运算复杂度更低, 运算量更小, 有助于提高效率, 降低成本。

Abstract: Tramcar collision avoidance radars usually use direct matrix inversion to detect signals, which has high complexity and large amount of computation. Through analyzing the characteristics of clutter, interference and noise around the tram anti-collision radar system, the conjugate gradient matched filter was applied to detect the tram anti-collision radar signal, which not only obtained the optimal CFAR detector, but also had lower computational complexity and smaller calculation amount than the direct matrix inversion method did. The proposed method can improve the efficiency and reduce the cost.

Key words: railway engineering, conjugate gradient detection method, tram, radar collision avoidance system