Research of Detection and Parameter Estimation for P3 /P4 Polyphase Codes Signal
DU Qing · Science Technology and Engineering · 2013
Against the problems of detection and parameter estimation for P3/P4 polyphase codes signal,joint algorithms based on the integrated quadratic phase function and Fractional Fourier transform are proposed.The polyphase codes signal's integrated quadratic phase function has its energy concentrated along a ridge that runs parallel with the axis of time,which is used to obtain the estimation of the sweep rate.And the algorithm estimates RF,bandwidth,period via Fractional Fourier transform.Finally,the detection performance and parameter estimation performance is evaluated by computer simulations,which shows that the method has a low computational cost and a high precision of parameter estimation.