提出了将时频分布进行时频重排再利用Hough变换，对多目标雷达回波信号的检测与参数估计方法，解决了WVD—Hough方法中交叉项引起伪尖峰所造成的误检测以及QTFD—Hough的时频聚集性下降引起的参数估计精度降低和运行时间增大的问题。仿真实验表明，该方法能有效地检测多目标雷达回波信号并准确地估计其参数，而且有较好的抗噪声性能。

A novel method of detection and parameter estimation for multi target radar echo signal is proposed in this paper, which by applying reassignment method to the quadratic time frequency distributions of the signal before Hough transform to eliminate the cross term interference and improve the accuracy of parameter estimation and reduce the time of Hough transform. The simulation results show that this method is not only suitable for the detection and the parameter estimation of multi target radar echo signal, but also good at reducing noise.

TN957.51

江苏省自然科学基金项目(BK2002068)