Passive bistatic noise radar using DVB-T signals

Abstract

This study presents a new approach to passively detect targets using noise-like emitters of opportunity. This method combines the Wiener filtering to achieve clutter rejection and a proposed adaptation to noise-like signals of the amplitude and phase estimation (APES) method. This theoretical approach is confirmed by the detection of a helicopter by a bistatic radar using a digital video broadcasting terrestrial (DVB-T) transmitter.

Mixed Signal-Based GLR Detector for Fm Passive Bistatic Radar Target Detection

“…The mixing product (mixed signal) corresponding to sample delay (delay cell) m is defined as [13][14][15][16]:…”

“…Since the maximum Doppler frequency of targets, denoted by f tmax , is much smaller than the sampling frequency, the mixed signal is then applied to a low-pass filter (LPF) and subsampled by the subsampling factor S [13][14][15][16] to yieldỹ(m) with N d = N/S samples. This process which does not affect the range resolution [14][15][16] can be implemented using the following low-pass filtering and subsampling (integrateand-dump filtering) matrix:…”

“…This process which does not affect the range resolution [14][15][16] can be implemented using the following low-pass filtering and subsampling (integrateand-dump filtering) matrix:…”

“…In this regard, we investigate the problem of CFAR target detection in FM-based PBRs using the mixing product (mixed signal) model. The mixing product was previously used to implement the CAF to minimize the computational burden [13] and also to adopt space time adaptive processing (STAP) methods to airborne PBRs [14][15][16]. We use this signal model to derive a GLRT-based detector which is called M-GLRT throughout the manuscript to distinguish it from the existing GLRT [9,10].…”

Reduced complexity generalised likelihood ratio detector for digital video broadcasting terrestrial‐based passive radar

“…Since the PBRs benefit from low cost, low weight, covert surveillance and enhancing radar cross section in some bistatic geometries, there have been an increasingly interest in the PBR systems during recent years [1–8]. Different kinds of IO's have been considered in the literature, for example, frequency modulated (FM) radio [9, 10], analog TV [1, 3], digital audio broadcasting [6, 7], digital video broadcasting [11, 12] and communication signals such as global system for mobile and universal mobile telecommunication system [13–15, 27].…”