基于高阶累计量的车辆上下行声频检测方法

Up and Down Vehicles Detection Method with Acoustics Based on High-order Cumulant

提出了一种基于麦克风阵列信号处理的车辆上下行估计的新方法,将车辆的上下行估计归结为阵列信号处理中的波达方向变化的估计。针对车辆噪声信号的复杂性和二阶统计量的局限性,采用高阶累计量实现了DOA估计,并说明了基于高阶累计量实现的估计结果明显优于二阶统计量。最后通过试验论证了该方法在实现行车方向估计时的有效性。

A new method for estimation of up and down vehicles is presented with microphone array signal processing, and the estimation of up and down vehicles can be transformed into the estimation of DOA alteration in array signal processing. Because of the complication of vehicle noise signal and the limitation of second-order cumulant, DOA estimation is realized with high-order cumulant method, and the result is proved more available with high-order than second-order cumulant. At last, this method is feasible by experiment.