Estimation Method of LFM Based on Fractional Fourier Transform
You He · Radar Science and Technology · 2010
The paper proposes an estimation method for linear frequency modulation(LFM)signal detec-tion based on the fractional Fourier transform(FRFT).First FRFT is performed on LFM signal in big inter-val,and then the hypo-maximum and tertiary maximum are found.Lastly FRFT is performed on LFM signal in small interval.Now the angle corresponding to the maximum is the optimal angle.The frequency modula-tion of the LFM can be gained from dimensional normalization.The twi-searching method doesnt need planar search,consumedly reducing the computation cost at the same precision.