Statistical description of monopulse parameters for tracking Rayleigh targets

Using the amplitude conditioned probability density function (PDF) for monopulse radar measurements, the Cramer-Rao lower bound (CRLB) is developed for any unbiased estimator of the direction of arrival (DOA). Maximum likelihood (ML) and method of moments (MM) estimators of the DOA are developed along with estimates of the variances associated with the monopulse ratios and DOA estimate. The case of an unknown target amplitude is addressed by using the ML estimate of the target amplitude parameter formed from the sum signal. Using simulation results, the performances of the ML and MM estimators of the DOA are compared with the standard monopulse ratio and the performance of the variance estimators is studied