Foliage Penetration Radar: Detection and characterisation of objects under trees

Davis, Mark E.

doi:10.1049/sbra007e

Cited by 73 publications

(31 citation statements)

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“…The ability of traditional microwave radars in operating in an environment with dense foliage is severely limited by foliage backscatter and attenuation of microwave frequencies through foliage [151]. As attenuation falls with increasing wavelength, lower frequencies such as those in the VHF and UHF bands (30-1000 MHz) may be suitable for FOPEN radar applications [152][153][154][155]. FOPEN SAR (Synthetic Aperture Radar) systems started to be used in the early 1990s.…”

Section: Foliage Penetrating (Fopen) Radarmentioning

confidence: 99%

Integrated Sensor Systems and Data Fusion for Homeland Protection

Farina

Ortenzi

Ristić

et al. 2014

Academic Press Library in Signal Processing: Volume 2 - Communications and Radar Signal Processing

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Section: Foliage Penetrating (Fopen) Radarmentioning

confidence: 99%

Integrated Sensor Systems and Data Fusion for Homeland Protection

Farina

Ortenzi

Ristić

et al. 2014

Academic Press Library in Signal Processing: Volume 2 - Communications and Radar Signal Processing

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“…Ultrahigh frequency (UHF) ultrawidebeam-ultrawideband SAR (UWB SAR) [18]- [22], [25], [29] refers to an SAR system that works in UHF signal with the large fractional signal bandwidth and wide antenna beamwidth associated with wide integration angle. It has the excellent foliage or ground penetrating ability and high-resolution imaging ability to detect the concealed targets [18], [22].…”

Section: Introductionmentioning

confidence: 99%

“…It has the excellent foliage or ground penetrating ability and high-resolution imaging ability to detect the concealed targets [18], [22]. It is a significant advantage that the OS-BiSAR system operates in the UHF UWB mode, and several experiments for the one-stationary bistatic UHF UWB SAR have been carried out [15]- [17].…”

Section: Introductionmentioning

confidence: 99%

Research on Spatial Resolution of One-Stationary Bistatic Ultrahigh Frequency Ultrawidebeam–Ultrawideband SAR Based on Scattering Target Wavenumber Domain Support

Xie

Huang

et al. 2015

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Compared with the traditional one-stationary bistatic narrowbeam-narrowband (NB) synthetic aperture radar (SAR), the coupling between the azimuth and range wavenumbers for the one-stationary bistatic ultrahigh frequency (UHF) ultrawidebeam-ultrawideband (UWB) SAR is much larger due to the large fractional signal bandwidth and wide antenna beamwidth, which may affect the behavior of spatial resolutions. Considering the wavenumber coupling, the more accurate spatial resolutions for the one-stationary bistatic UHF UWB SAR are proposed based on the wavenumber domain support of the scattering target in this paper. First, the one-stationary bistatic SAR imaging geometry is provided, and then the spatial wavenumber of the scattering target for the one-stationary bistatic UHF UWB SAR is analyzed. Second, based on the spatial wavenumber spectrum, spatial resolutions of the one-stationary bistatic UHF UWB SAR are derived in detail. In addition, the squint angles of radars are considered in the derivation of the spatial resolutions. Besides, the narrowing/broadening factors defined as the ratio of the proposed spatial resolutions to traditional spatial resolutions are presented, which describe the effects of the fractional bandwidth and associated integration angle on the spatial resolutions. Finally, simulation results are given to prove the correctness and validity of the proposed resolutions.Index Terms-One-stationary bistatic synthetic aperture radar (OS-BiSAR), spatial resolution, ultrahigh frequency (UHF), ultrawidebeam-ultrawideband (UWB), wavenumber domain support.

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“…Very high frequency (VHF) and ultrahigh frequency(UHF) ultra-wideband (UWB) SAR has well characteristics such as remarkable foliage penetrability and anti-jamming ability, thus it is able to detect vehicles or panzers concealed in the forest [8][9][10][11][12]. Therefore it is a significant advantage that the OS-BiSAR system operates in VHF/UHF UWB.…”

Section: Introductionmentioning

confidence: 99%

Fast factorised backprojection algorithm in elliptical polar coordinate for one‐stationary bistatic very high frequency/ultrahigh frequency ultra‐wideband synthetic aperture radar with arbitrary motion

Xie

Huang

et al. 2014

IET Radar, Sonar & Navigation

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The precise disposal of azimuth variance of range cell migrations and motion errors in the one-stationary bistatic very high frequency/ultrahigh frequency ultra-wideband synthetic aperture radar imaging is a real challenge for efficient frequencydomain algorithms, but can be precisely managed by time-domain approaches. In this study, a novel bistatic fast factorised backprojection (BFFBP) algorithm is presented, which can deal with these two effects accurately and achieve the computational performance in parity with frequency-domain algorithms. First, the imaging geometry with arbitrary motion in elliptical polar coordinate is provided, and the analytical expression of the bistatic backprojection algorithm in this coordinate system is derived, which provides a theory basis for the proposed algorithm. Then, based on the subaperture imaging geometry, the sampling requirements considering motion errors is deduced, which offers the optimal tradeoff between the imaging quality and computational speed. The advantage of using elliptical polar coordinate system for implementing the BFFBP algorithm is analysed. Finally, the implementation and computational burden of the BFFBP algorithm are discussed. Simulation results are shown to prove the correctness of the theory analysis and validity of the proposed approach.

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Foliage Penetration Radar: Detection and characterisation of objects under trees

Cited by 73 publications

References 0 publications

Integrated Sensor Systems and Data Fusion for Homeland Protection

Integrated Sensor Systems and Data Fusion for Homeland Protection

Research on Spatial Resolution of One-Stationary Bistatic Ultrahigh Frequency Ultrawidebeam–Ultrawideband SAR Based on Scattering Target Wavenumber Domain Support

Fast factorised backprojection algorithm in elliptical polar coordinate for one‐stationary bistatic very high frequency/ultrahigh frequency ultra‐wideband synthetic aperture radar with arbitrary motion

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