The method of range profile for step frequency MMW radar based on wavelet transform power spectrum estimator

The range profile method for step frequency MMW radar targets based on a wavelet transform power spectrum estimator is studied. This method can successfully measure the power spectrum in samples for which traditional methods often fail because the samples are finite sized, have a complex geometry, or are varyingly sampled. We apply this method to the practical step frequency MMW radar target echo signals, and on the condition of the same sampling frequency and sampling data length, it can achieve a one dimensional range profile with profile resolution superior to FFT. Compared with the FFT algorithm using a wavelet spectrum estimator of short data series, we can achieve high resolution, high accuracy, and low SNR threshold. The experimental results make clear that the DWT estimator is a sensitive tool in range profile of step frequency NMW radar.