Method and apparatus for firmly echo under pressures in the intermediate frequency for a coherent pulse radar

摘要

The device of the elimination of echoes from fixed targets, in the intermediate frequency, in a pulsed radar coherent, proceeds to the cancellation of echoes from fixed targets by storing in the form of samples of amplitude and phase of the response to the first pulse of a burst is reduced to video band, for the synthesis of a replica in intermediate frequency band to the response to the first pulse of a burst on the basis of these samples and to the subtraction of the replica synthesized at each of the subsequent pulses of the burst. It is of the type with a double cancellation, the production of the replica is carried out in two steps, a first step for the rough-cutting which is formed a rough replica and a second refining stage where the modelling error of the rough replica is taken into account.