Performance comparison of mean-level CFAR detectors in homogeneous and non-homogeneous Weibull clutter for MIMO radars

Abstract

In this paper, we analyze and compare the performance of the CA-CFAR, GO-CFAR and the SO-CFAR detectors in homogeneous and non-homogeneous Weibull background with known shape parameter for Multi-Input Multi-Output radars with widely separated antennas. The non-homogeneity is represented by the presence of interfering targets and a clutter edge in the reference window. We derive closed-form expressions of the probability of false alarm of the three detectors in homogeneous environment. Detector performance in non-homogeneous environment is investigated by means of Monte Carlo simulations. The numerical results show that the best performance is obtained by the SO-CFAR in the case of a high number of interferences, whereas the GO-CFAR has the best false-alarm regulation when the number of cells contaminated by clutter exceeds half the number of reference cells. Keywords MIMO radar • Weibull clutter • CFAR detectors • Non-homogeneous clutter 1 IntroductionMulti-Input Multi-Output (MIMO) is a technique used in communications to increase data throughput and link range without additional bandwidth or transmit power [1,2]. Later on this concept has been also adopted for radar applications, where multiple antennas are employed both at transmission and at reception. Unlike multistatic radar system where the same waveform is transmitted, orthogonal waveforms are used for the MIMO radar system to exploit spatial and waveform diversity gain simultaneously. This concept has the ability to improve parameter estimation and beamforming performance by having transmit and receive antennas close

Research on Radar Jamming for Detection Performance

“…Next is the moving target indication, Gallagher K A applied this technique to study moving target indication for non-linear radar [16]. Constant false alarm rate detection is also a part of signal processing, Baadeche M et al explored the CFAR detection performance of MIMO radar in non-uniform and uniform cases [17]. Weinberg G V et al conducted a study of CFAR for Pareto type II clutter [18].…”