Adaptive digital filtering for coherent MTI radar

Chapter 15 Mti Radar

The purpose of moving-target indication (MTI) radar is to reject signals from fixed or slow-moving unwanted targets, such as buildings, hills, trees, sea, and rain, and retain for detection or display signals from moving targets such as aircraft. Figure 15.1 shows a pair of photographs of a PPI (plan position indicator) which illustrate the effectiveness of a properly working MTI system. The di...

Digital Adaptive Spectral Filtering

An adaptive procedure for removing a multimodal power spectrum using cascaded transversal digital filters is described. Sach section of the c/erall filtfir consists of a second order transversal filter whose zero pair is adaptively adjusted to remove one of the modes of the undesired spectrum. Ihe paper is divided into two sections. The paper first treats the case of an unknown but unimodal pow...

Adaptive Speckle Filtering in Radar Imagery

Novel algorithm for elimination of ghosts in ambiguous MTI radar

In this study we have investigated a new method to reduce the number of ghosts produced by a medium pulse repetition frequency (PRF) MTI radar incorporating ambiguity resolution techniques. The paper introduces the concepts behind ambiguity resolution and ghost reduction techniques. Simulations have been carried out to verify the performance of the developed ghost reduction algorithm and the re...

Digital video stabilizer by adaptive fuzzy filtering

Digital video stabilization (DVS) allows acquiring video sequences without disturbing jerkiness, removing unwanted camera movements. A good DVS should remove the unwanted camera movements while maintains the intentional camera movements. In this article, we propose a novel DVS algorithm that compensates the camera jitters applying an adaptive fuzzy filter on the global motion of video frames. T...