Feasibility of Air Target Detection Using GPS as a Bistatic Radar

Glennon, Eamonn; Dempster, Andrew G.; Rizos, Chris

doi:10.5081/jgps.5.1.119

Cited by 44 publications

(23 citation statements)

References 6 publications

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“…In digital processing case, one complex multiplication needs six floating-point (FLOP) operations, and the signal FFT and IFFT operation with a length of N needs 5Nlog 2 (N) FLOP. Therefore, based on (13) and (17), the azimuth processing computation load is:…”

Section: Computation Analysis About the Azimuth Coherent Processingmentioning

confidence: 99%

“…However, the unique geometry will limit its wide application, and sometimes, there is even no available GNSS satellite for forward scattering. For normal bistatic geometry in GNSS-based passive radar, a high receiver antenna gain with extremely long integration duration is highly recommended [13], and the target detection applications are normally focused on medium-or large-sized targets, like aircrafts or marine targets [6,13]. Then, the accompanying problem is long duration, 2-dimensional (2-D), coherent integration processing.…”

Section: Introductionmentioning

confidence: 99%

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2-D Coherent Integration Processing and Detecting of Aircrafts Using GNSS-Based Passive Radar

et al. 2018

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Long time coherent integration is a vital method for improving the detection ability of global navigation satellite system (GNSS)-based passive radar, because the GNSS signal is not radar-designed and its power level is very low. For aircraft detection, the large range cell migration (RCM) and Doppler frequency migration (DFM) will seriously affect the coherent processing of azimuth signals, and the traditional range match filter will also be mismatched due to the Doppler-intolerant characteristic of GNSS signals. Accordingly, the energy loss of 2-dimensional (2-D) coherent processing is inevitable in traditional methods. In this paper, a novel 2-D coherent integration processing and algorithm for aircraft target detection is proposed. For azimuth processing, a modified Radon Fourier Transform (RFT) with range-walk removal and Doppler rate estimation is performed. In respect to range compression, a modified matched filter with a shifting Doppler is applied. As a result, the signal will be accurately focused in the range-Doppler domain, and a sufficiently high SNR can be obtained for aircraft detection with a moving target detector. Numerical simulations demonstrate that the range-Doppler parameters of an aircraft target can be obtained, and the position and velocity of the aircraft can be estimated accurately by multiple observation geometries due to abundant GNSS resources. The experimental results also illustrate that the blind Doppler sidelobe is suppressed effectively and the proposed algorithm has a good performance even in the presence of Doppler ambiguity.

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Section: Computation Analysis About the Azimuth Coherent Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

2-D Coherent Integration Processing and Detecting of Aircrafts Using GNSS-Based Passive Radar

et al. 2018

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“…For a GPS L5 receiver, the frequency bandwidth is 20.46 MHz, and the noise level N r in decibels is nearly -131 dB. The signal-to-noise ratio at the RF front-end output of the GPS receiver can be written as (Glennon et al, 2006):…”

Section: Signal Processingmentioning

confidence: 99%

Target Detection Using Forward Scattering Radar With GPS Receivers

Behar

Kabakchiev

Rohling

2012

Proceedings of the First International Conference on Telecommunications and Remote Sensing

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“…In last years, passive GPS-based radar systems (bistatic and FSR) became increasingly popular as an alternative to traditional radar systems. In [1,2], the authors examine the idea to detect air targets using bistatic and forward scatter radar, which exploit GPS satellites as transmitters. In these articles they make the theoretical analysis of possibilities to detect air or sea targets in such radar systems and talk over on the eventual difficulties in the practical implementation of such systems.…”

Section: Introductionmentioning

confidence: 99%

Observation of Falling Cosmic Objects Using GPS-Based FSR

Kabakchiev

Behar

Garvanov

et al. 2018

2018 19th International Radar Symposium (IRS)

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In this paper, the possibility of GPS-based Forward Scatter Radar (GPS FSR), where satellites are exploited as sources of signals, to detect falling cosmic objects is examined. It is known that in FSR systems, the signal re-reflected by falling cosmic objects as masked by a much stronger direct signal. The goal of the article is to evaluate signalto-noise ratio (SNR) of these signals at the detector input, after the correlator and the integrator. The results obtained show that the difference in SNR between direct and rereflected signals is substantially dependent on the size of the falling object and the distance to it. The results obtained indicate what signal processing needs to be performed to separate the useful target signal from the direct signal.

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Feasibility of Air Target Detection Using GPS as a Bistatic Radar

Cited by 44 publications

References 6 publications

2-D Coherent Integration Processing and Detecting of Aircrafts Using GNSS-Based Passive Radar

2-D Coherent Integration Processing and Detecting of Aircrafts Using GNSS-Based Passive Radar

Target Detection Using Forward Scattering Radar With GPS Receivers

Observation of Falling Cosmic Objects Using GPS-Based FSR

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