Wigner-Hough变换在车流量检测雷达信号处理中的应用

Application of Wigner-Hough Transform for Signal Processing in Vehicle Volume Detecting Radar

在车流量检测雷达中,由于受噪声和干扰的影响,中频信号实际是非平稳的,在频域内很难准确地估计目标参数。本文通过分析目标信号、干扰信号和噪声在Wigner时频平面的分布特性,提出了利用Wigner-Hough变换来估计目标参数的方法;文中同时讨论了Wigner-Hough变换的实现问题。实验结果表明,该方法在车辆目标判断方面具有较好的性能。

Influenced by noises and disturbances, the intermediate frequency （IF） signals are nonstationary in a vehicle detecting radar, so it is difficult to estimate target parameters exactly in frequency-domain. The Wigner-Hough transform （WHT） is presented to estimate target parameters based on the analysis of the Wigner-Ville distribution of target signals, disturbance signals and noises in the time-frequency plane; the implementation of the WHT is also discussed. Experimental results show that the method has good performance in the target identification.