Performance of corrected adaptive monopulse estimation

The shape of sum and difference beams can be severely distorted if nulls in jammer directions are formed. In a previous paper a correction formula was developed that can be applied to monopulse estimation with subarray output adaptive arrays as well as to generalised sidelobe canceller (GSLC) config urations. The present paper derives the probability density function for su ch monopulse estimators with given adaptive beams for Rayleigh targets and jammers. With this both mean and variance can be easily calculated. For non fluctuating targets and gaussian jammers formulas for the mean and variance are given which have to be evaluated numerically. These results can be use d to analyse the performance of different corrected adaptive monopulse sche mes. In particular it is demonstrated how the bias and variance of the mono pulse estimates depend on jammer location, SNR, type and number of subarray s or auxiliary channels for the GSLC.