利用单检波器数据估计高铁列车运行速度

Based on the fixed carriage structure assumption, the acquired dataset from one receiver near the high-speed railway can be used to estimate running velocity of high-speed train (HST). We derive the relationship between the load function and the speed of the railway, and then propose the HST velocity estimating method based on velocity scanning. Firstly, this method generates a series of amplitude spectra of load function according to a series of preset velocity. Then a series of cross-correlation coefficients between the pre-computed amplitude spectra and the amplitude spectrum of the real signal from one pre-buried receiver can be computed. The velocity with maximum cross-correlation coefficients is chosen as a final velocity estimation of HST. Finally, one synthetic data example and some real data examples illustrate our method's effectiveness. Furthermore, the proposed method has the potential to be further extended to estimate running velocity of moving objects with the fixed structure in other road traffic.