Oblique projection polarisation filtering for interference suppression in high-frequency surface wave radar

Mao, Xingpeng; Liu, A.-J.; Hou, Huijun; Hu, Hong; Guo, Ruifeng; Deng, Weibo

doi:10.1049/iet-rsn.2011.0175

Cited by 30 publications

(32 citation statements)

References 13 publications

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“…In [13][14][15][16], oblique projection technology was introduced into the polarization domain. It employed disjoint polarization subspaces to construct polarization oblique projection operator, which could remain undistorted target signal and absolutely suppress jamming signal, whereas the polarization oblique projection operator based on dual polarization radar is very sensitive for estimation error of the polarization characteristic.…”

Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

Adaptive Countering Technique for Angle Deception Based on Dual Polarization Radar Seeker

Zhang

Pan

2017

International Journal of Antennas and Propagation

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Angle deception jamming makes the monopulse radar seeker track to itself but not the real target, which is catastrophic for the guidance radar. In this paper, an adaptive technique based on dual polarization radar is presented to counter it. How angle deception jamming acts on the monopulse tracking radar is first investigated. An angle estimation technique of the real target is then derived from the conventional monopulse method, although it is being interfered with by angle deception jamming. Meanwhile, the polarization ratio characteristic of the angle deception jamming could be adaptively estimated in current practical scene. Furthermore, the similar characteristic of Jones vectors is defined as the rule to judge whether the target is being interfered with by jamming. It can make the radar seeker select different techniques for angle estimation adaptively. Finally, two major factors of angle estimation accuracy are analyzed by simulation and the effectiveness of the proposed technique is proved through experiments.

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Section: International Journal Of Antennas and Propagationmentioning

confidence: 99%

Adaptive Countering Technique for Angle Deception Based on Dual Polarization Radar Seeker

Zhang

Pan

2017

International Journal of Antennas and Propagation

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“…Similarly, we can calculate that (see (15), (16) and (17)) Substituting (14)-(17) into (12) and (13), we yield the output errors of target echo and jamming when Δγ t , Δγ i , Δδ t and Δδ i are small enough, respectively, as (see (18) and (19)) Equation (18) illustrates that the output error of the target echo after polarisation oblique projection is related to the estimation errors of the target polarisation parameters, and is independent of the estimation errors of jamming polarisation parameters when estimation errors of the target and jamming polarisation parameters are small enough. Equation (19) indicates that the output error of the jamming after polarisation oblique projection is related to the estimation errors of jamming polarisation parameters, and is independent of the estimation errors of target polarisation parameters when estimation errors of the target and jamming polarisation parameters are small enough.…”

Section: Polarisation Oblique Projection Operatormentioning

confidence: 99%

“…In recent years, oblique projection has been introduced to the polarisation field, and the polarisation oblique projection operator is constructed by two disjoint polarisation subspaces [14]. With this idea, an oblique projection polarisation filter is proposed to suppress the interference of high frequency surface wave radar by assuming the target or the interference polarisation parameters are known [15][16][17]. Nevertheless, the target and the interference polarisation parameters are usually unknown in reality, and estimation errors often exist when estimating the polarisation parameters [18,19].…”

Section: Introductionmentioning

confidence: 99%

Polarisation oblique projection for radar seeker tracking in chaff centroid jamming environment without prior knowledge

Yang

Xiao

Feng

et al. 2014

IET Radar, Sonar & Navigation

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Chaff centroid jamming makes the indicated angle of a target by a radar seeker bias off the target, which is catastrophic to the radar seeker target tracking. In this study, the authors propose to suppress the chaff centroid jamming by polarisation oblique projection without prior knowledge of the target and the jamming polarisation parameters. At first, they prove that interference-to-signal ratio and in-phase monopulse ratio error after polarisation oblique projection are both independent of the estimation errors of the target polarisation parameters by theoretical derivation and geometrical interpretation. Then they estimate the polarisation parameters of chaff centroid jamming directly by the radar seeker received signal, and construct the polarisation oblique projection operator using the estimated jamming polarisation parameters and randomly set target polarisation parameters. They suppress the chaff centroid jamming with the estimated polarisation oblique projection operator, and demonstrate the validity of the proposed method by Monte Carlo simulations.

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“…In this paper, a novel signal separation algorithm, that is, signal decomposition based on oblique projection (SDOP), is proposed to address this problem. Oblique projection is an effective mathematical tool for vector decomposition and widely utilised in the signal processing domain, such as the oblique projection polarisation filtering [16] for interference suppression, oblique…”

Section: Introductionmentioning

confidence: 99%

Multiple input and multiple output synthetic aperture radar multiple waveform separation based on oblique projection in same frequency coverage

Meng

Liu

et al. 2015

IET Radar, Sonar & Navigation

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In multiple input and multiple output synthetic aperture radar (MIMO-SAR) the unwanted cross-correlation output sexist inevitably in the superposed echoes of multiple transmitted orthogonal waveforms in the same frequency coverage, which may deteriorate the quality of the reconstructed SAR image because of the high synthetic integrated sidelobe level (SISL). In this study, a novel signal decomposition based on oblique projection (SDOP) method is proposed to suppress the cross-correlation outputs. At first, the superposed echo of each receiver is modelled as a linear-combined vector of transmitted multiple waveforms. Then, the echo of each transmitted waveform is obtained by signal decomposition on the combined vector via SDOP, respectively. Besides, two new metrics, that is, synthetics integrated sidelobe level ratio improved factor and integrated sidelobe level ratio loss factor, are also proposed to assess the separation performance. It is found that the cross-correlation can be effectively suppressed among multiple waveforms via low-complexity projection operators and the output signal noise ratio can be remarkably improved, accordingly. Finally, the numerical experiments are also provided to demonstrate the effectiveness of the proposed method.

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Oblique projection polarisation filtering for interference suppression in high-frequency surface wave radar

Cited by 30 publications

References 13 publications

Adaptive Countering Technique for Angle Deception Based on Dual Polarization Radar Seeker

Adaptive Countering Technique for Angle Deception Based on Dual Polarization Radar Seeker

Polarisation oblique projection for radar seeker tracking in chaff centroid jamming environment without prior knowledge

Multiple input and multiple output synthetic aperture radar multiple waveform separation based on oblique projection in same frequency coverage

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