Reference oscillator stability effect on clutter cancellation in a radar system

A model to calculate the improvement value in a video processor consisting of a generic filter with only zeros for radar applications was applied to two oscillators with known characteristics. The maximum value of improvement attainable does not depend on the frequency response of the processor, nor on the behavior of the nonuniform part of the oscillator's spectrum. It is limited by the uniform level of the spectrum. Improvement values obtained from a clutter with nonideal characteristics depend on the processor. The improvement calculation was carried out starting from the spectrum (in the frequency domain). It can also be carried out in the time variable domain, by using directly the autocorrelation function. The choice made takes into account the fact that the characteristics of the oscillators are often defined in terms of the spectrum, rather than autocorrelation function.