Fast Adaptive Method of the Multi-LFM Signal Detection and Parameter Estimation Based on Fractional Fourier Transform
XU Xiang-hui · Science Technology and Engineering · 2012
Two fast adaptive methods of the multi-LFM signal detection and parameter estimation based on FRFT are presented.Against FRFT's two-dimensional search problem,two pre-judge ways are proposed: using single-phase method to analyze the time autocorrelation sequence's spectrum and predicting the chirp rate.The computational complexity has a significant reduction without affecting the estimation accuracy of the premise and can also get good results in low SNR.Computer simulations verify the effectiveness of this method.