Effect of Doppler centroid mis-tracking on the parameter estimation of point target complex signals

The effect of errors in zero Doppler estimation on the accuracy of the three methods currently used for estimation of point target signal parameters, is analyzed. It is shown that for reliable estimation of the phase, the Doppler centroid should be well corrected before the application of either the peak method (PM) or the complex integration method (CIM). For radiometric estimation, the Doppler offset sensitivity is comparable for the PM, the CIM, and the intensity integration method (IIM). All of them are insensitive to moderate Doppler centroid tracking errors for intensity estimation