Clutter elimination method by adaptive filtering in pulse Doppler radar

摘要

The method involves calculating the coeffts. of the nth-order transversal filter (FNT). The coeffts. are determined adaptively by a pseudo-coherent integrator (IPC) whose output stage (I) adds, component by component, all perturbed and delayed (MR) vectors supplied during a burst by a redistributive buffer memory and correlator of signals from phase and quadrature channel coders.The vector sum is applied to a net filter (FT) which provides the associated reflection coeffts. for a calculator (CC) of the transversal filter coeffts. The net filter is equipped with a threshold circuit for suppression of coeffts. falling below the threshold.