Improvement Factor of a Nonlinear MTI in Point Clutter

An analysis is conducted of the behavior of a single and double canceller moving target indicator (MTI) receiver in the presence of concentrated clutter. For the antenna beam, an analytical expression that also takes sidelobes into account has been used. In particular, the effect of limitation in the IF characteristic on cancellation has been studied. As a result, the improvement factor, defined as the ratio between the signal-to-clutter ratios at the input and at the output of the canceller, is considerably reduced by the nonlinearity.