Relative performance of a simple MTI canceller selection rule

The performance of an MTI canceller selection rule, which is solely based on clutter suppression, is analysed in terms of incorrect selection probability and average loss in signal-to-interference ratio (SIR). It is concluded that the variation in target signal power transfer, as a function of the target radial velocity, is responsible for most incorrect canceller choices. The resulting loss in SIR is typically around 3 dB, with peaks to 6¿¿9 dB in worst-case situations.