Plane averaging signal processing on radar using DFT technology

The need of primary radar´s adaption into an automatic control system has led to the development of various anti-clutter techniques to provide high and reliable detectability in heavy clutter conditions. (1) However, the techniques mainly based on MTI canceller still have inherent limitations, such as inadequate improvement of detection in a moving clutter and heavy ground clutter and deterioration of the MTI detection probability of a target flying tangentially toward the radar. To improve these limitations, this paper discusses a new clutter rejection system - discrete Fourier transform cascaded by a plane average-subtract processing unit. The method is based on frequency discrimination and utilization of difference of spatial spread between targets and clutters.