基于小波变换的宽带模糊函数估计器

Wavelet Transform Based WBAF Estimator

提出了一种基于小波变换的宽带模糊函数参数估计器 ,即通过交互小波变换计算宽带模糊函数 ,取宽带模糊函数模的平方的峰值点对应参数作为目标时延与时间伸缩的估计 .仿真结果表明 ,该估计器的估计性能好于直接模糊函数估计器 ,且计算方便 。

A wide—band parameter estimator based on wavelet tranMorm is presentea in this paper．This estimator takes parameters relative to the peak of squared amplitude of wide—band ambiguity function(WBAF) as the estimation of time delay and time stretch of target，where the WBAF is calculated by cross wavelet transform(CWT)．Simulation results show that the performance of this estimator is more better than that of WBAF estimator which is calculated directly．This CWT—based WBAF estimator is suitable for practical wide—band processing．