The degradation incurred with a conventionally weighted moving target indication (MTI) or Doppler filter radar when one of the return pulses is missing is investigated. It is shown that, for conventional MTI and Doppler filter bank processor, the loss in performance can be large. For the single filter, such as an MTI filter, it is shown that the eigenvector methods for determining the weighting can result in large losses. However, the minimax log energy (MMLE) method is shown to give nearly optimal performance. It is shown that, using the MMLE design procedure, the number of filters could be substantially reduced without incurring a large degradation in performance. >

Missing radar pulse clutter processing

The detection of a target in correlated clutter, thermal noise, and extraneous interference is considered. The amplitude, phase and Doppler frequency of the signal are not known a priori. A general criterion is presented which measures the performance of a suboptimal test relative to an optimal test. The criterion is encompassed into a design procedure used to design Doppler filters. The procedure allows many design considerations to be taken into account, and results in a design which attempts to minimize the number of filters required. For low dimensionality the procedure results in single filter designs; for higher dimensionality multiple filters are designed. The performances of these systems are compared with the results obtained by Emerson (1978) and Andrews (1974). It is found that the procedure yields good filter designs under general conditions and may reduce the number of filters required compared with classical designs. >

E. Fong

Papers

Moving target indication in the presence of radio frequency interference