Pre-processing method of data processing for phased array radar

The phenomenon of observation multiplicity for the phased-array radar is studied and a preprocessing algorithm to eliminate the redundant observations is proposed. At first, the probabilities of redundant observations exist are derived. It is shown that these probabilities depend on signal-to-noise-ratio and the spacing between the adjacent beams. Second, a priori knowledge of the maximum number of observations to be merged and the maximum merging range is introduced to the pre-processing method. At last, the measurement's error before and after mergence is calculated, and the performance of this method is compared with those methods without any limitations.