Clutter cancellation in passive radar using GSM broadcast channels

Abstract

This study focuses on passive coherent location using global system for mobile communications base stations transmitting mainly dummy bursts in idle mode. The authors present adaptive delay line canceller techniques to suppress the zero-Doppler direct path and its clutter almost down to the receiver noise level. The proposed approaches offer the following two advantages compared with the other clutter cancellation techniques: they are fail-safe with respect to the errors in the reference signal extraction simply because they do not require any knowledge of the reference signal and they even work in severely non-stationary clutter conditions. The effectiveness of the approaches is demonstrated by means of measurements recorded with an experimental passive bistatic radar system

Performance Analysis of Target Localization according to the placement of Multiple-Receivers in Passive Bistatic Radar Systems

“…수동형 바이스태틱 레이더(passive bistatic radar, PBR) 시스템은 송신기와 수신기가 분리된 레이더로, FM(frequency modulation), DVB(digital video broadcasting), DAB(digital audio broadcasting), GSM(global system for mobile communications) 등 의 상용 방송신호를 신호원으로 이용하여 표적을 탐 지 및 추정한다 [1][2][3][4][5] . 상용 방송신호를 사용하므로 주파 [6] .…”

DVB-T Airborne Passive Radar: clutter block rejection

“…Otherwise, the article [4] adapts to radar the CLEAN method introduced initially for astronomic purposes. However this processing generates artefacts especially in case of diffuse backscatterers [5]. Moreover, the author of [6] uses the OFDM signal properties to reject direct path frequency by frequency.…”

Space-Time Adaptive Cancellation in Passive Radar Systems

“…These procedures are quite different in implementation but solve the Wiener filtering problem without exception. The resulting FIR filter produces the sum of the properly weighted and delayed replicas of the reference signal, which is then subtracted from the surveillance channel [9][10][11][12][13][14][15][16].…”

“…Moreover, the spatial degrees of freedom can be utilized much more favorably to the suppression of nonreference-correlated interferences. Another problem is that beamforming techniques for direct path suppression blind the passive radar systems in the direction of the IO [3,12]. Avoiding blindness in the direction of high power interferences could be especially important where high azimuth coverage is required [17].…”