雷达测速在轨道交通中应用相当广泛,其中测速算法是系统的关键。介绍了经典功率谱估计法与现代功率谱估计法的相关内容,并对后者进行了重点阐述。通过在Matlab中仿真并观察分析信号的波形和功率谱,验证了理论的可行性。最终成功在实物上运行算法,对雷达传感器的输出信号进行分析并测得速度信号。 Radar speed measurement in rail transit is widely used, of which the speed measurement algorithm is the key to the system. The related content of classical power spectrum estimation method and modern power spectrum estimation method is introduced, and the latter is mainly elaborated. By simulating and observing the waveform and power spectrum of the signal in Matlab, the feasibility of the theory is verified. Eventually, the algorithm was run in-kind, analyzing the output signal of the radar sensor and measuring the speed signal.