Advanced multipath clutter cancellation in OFDM-based passive radar systems

Schwark, Christoph; Cristallini, Diego

doi:10.1109/radar.2016.7485166

Cited by 62 publications

(37 citation statements)

References 4 publications

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“…The complex attenuation α, which we consider constant during the coherent processing interval, stands for the antenna gain, the propagation losses and the target reflectivity. The static-clutter contribution can be mitigated by directing the antenna nulls towards the transmitter of opportunity and the major static scatterers, or by employing a static clutter suppression method [24][25][26] . The resulting surveillance signal x s ( n ), after static clutter suppression, can be expressed as a binary hypothesis model…”

Section: Received Signalsmentioning

confidence: 99%

Performance analysis of the reference signal reconstruction for DVB-T passive radars

2019

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The present work investigates the reference signal reconstruction method for passive coherent location (PCL) radars exploiting Digital Video Broadcasting-Terrestrial (DVB-T) signals. The reference signal reconstruction improves the signal-to-noise ratio (SNR) of the reference signal, which enhances the detection probability for DVB-T based PCL systems. The existing approach for the reference signal reconstruction is performed by demodulating the received reference signal to retrieve the transmitted quadrature amplitude modulation (QAM) symbols and modulate them to obtain the reconstructed signal. For low SNR values, the QAM symbol detection is accompanied with a significant error, which leads to a mismatch between the reconstrued signal and the exact one. Consequently, the expected improvement due to the signal reconstruction is limited. In this work, we propose an optimum reconstruction method which filters the detected QAM symbol prior to the remodulation step. To validate the proposed method, we retrieved analytic expressions for the detection and false-alarm probabilities and verified them through Monte-Carlo simulations. In addition, real-data sets were used to evaluate the proposed method performances. The results show that the proposed method outperforms the conventional one by extending the feasibility of the reference signal reconstruction for low SNR values.

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Section: Received Signalsmentioning

confidence: 99%

Performance analysis of the reference signal reconstruction for DVB-T passive radars

2019

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“…The masking effect of the static clutter can be mitigated by applying an adaptive or sequential static clutter suppression method [16][17][18], where the estimate of the reference signal and the synchronized received signal are employed. These methods induce high computational load, which increases the system complexity.…”

Section: Static Clutter Suppressionmentioning

confidence: 99%

On the feasibility of DVB-T based passive radar with a single receiver channel

Mahfoudia

Horlin

Neyt

2017

International Conference on Radar Systems (Radar 2017)

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The DVB-T signals are an attractive source of illumination for the passive radars due to their wide bandwidth and signal structure. The DVB-T standard permits the reconstruction of the received reference signal to enhance its signal-to-noise ratio (SNR). The signal reconstruction possibility allows the use of a simplified configuration of the radar by employing a single receiver. In this paper, we propose an optimized processing scheme for the single receiver DVB-T passive radar. We carry out Monte-Carlo simulations to assess the performances of the single receiver configuration, and we present real-data results to validate the proposed scheme.

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“…This filter mainly enhances the ECA-C by expanding the clutter subspace of each carrier by two replicas of the reference carrier shifted by the Doppler frequencies f ECA−CD = ±0.75Hz. (more details can be found in [3]). The results show the efficiency of the ECA-CD filter and its ability to perform the clutter suppression in real time.…”

Section: A Eca Filtermentioning

confidence: 99%

Multipath clutter cancellation and tracking algorithms for passive radars

Baruzzi

Schwark

Bournaka

et al. 2016

2016 17th International Radar Symposium (IRS)

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We demonstrate the ability of a passive radar system to monitor a large area of interest by applying advanced multipath clutter cancellation algorithm, spatial beamforming and tracking techniques. The mitigation of clutter disturbance and a two stage beamforming method facilitate real time tracking of small to moderate size targets in real Cartesian domain. The results have been validated through a real data acquisition campaign performed using an eleven element array antenna based passive radar developed at FHR Institute in Germany

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Advanced multipath clutter cancellation in OFDM-based passive radar systems

Cited by 62 publications

References 4 publications

Performance analysis of the reference signal reconstruction for DVB-T passive radars

Performance analysis of the reference signal reconstruction for DVB-T passive radars

On the feasibility of DVB-T based passive radar with a single receiver channel

Multipath clutter cancellation and tracking algorithms for passive radars

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