Detection and Parameter Estimation of Linear Frequency Modulated Signals Based on Radon Transform
Yu Yuan · Modern Defence Technology · 2013
A new double-quick method based on Radon-Wigner transform(RWT) and radon-Ambiguity transform(RAT) is presented for detection and parameter estimation of linear frequency modulated(LFM) signals in a noisy environment.The detection of signal is accomplished by one dimensional searching.Meanwhile the chirp rate identification is more accurate.Then,on the basis of de-chirping the LFM signal,a narrowband filter depresses most of the noise energy.In addition,when compared with other two dimension time frequency,it is easier in computation and simpler in implementation.Computer simulations have verified the effectiveness of the method.