Signal-to-clutter ratio enhancement in bistatic very high frequency (VHF)-band SAR images of truck vehicles in forested and urban terrain

Ulander, Lars M. H.; Barmettler, A.; Flood, B.; Frölind, P.-O.; Gustavsson, A.; Jonsson, T.; Meier, Erich; Rasmusson, Johan; Stenström, G.

doi:10.1049/iet-rsn.2009.0039

Cited by 23 publications

(15 citation statements)

References 15 publications

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“…It inherits advantages of the general BiSAR system [7], including excellent antijamming ability, possibility of covert receiver operation, reduced military vulnerability, potentially useful bistatic angle-dependent effects in the scattering phenomenology, possibility of exploiting additional information, and more flexibility of the system design. These advantages increase the capability, reliability, and flexibility of the future remote sensing mission, so it has gained wide attention in military and civilian fields these years [8]- [17].…”

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]. However, the UHF UWB signal and wide integration angle used in the one-stationary bistatic UHF UWB SAR bring new problems and challenges in comparison with the traditional narrowbeam-narrowband (NB) OS-BiSAR system [25], [29].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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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“…This BiSAR not only inherits the advantage of the general BiSAR system, but also is relatively easy to build and implement imaging, so it has gained wide attention these years [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore it is a significant advantage that the OS-BiSAR system operates in VHF/UHF UWB. In recent years, several countries have carried out experiments for one-stationary bistatic VHF/UHF UWB SAR, and some excellent results were obtained [1][2][3].…”

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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“…A SAR data simulator for bistatic SAR of a translational invariant case, which is seen as an important tool for testing the system parameters, is introduced in [2]. In another publication [3] the ability to detect targets in a background of forest and urban clutter is shown to be enhanced significantly by a suitable selection of bistatic SAR geometry in comparison to monostatic SAR.…”

Section: Introductionmentioning

confidence: 99%

Phase Error Calculation for Fast Time-Domain Bistatic SAR Algorithms

Sjogren

Pettersson

2013

IEEE Trans. Aerosp. Electron. Syst.

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Signal-to-clutter ratio enhancement in bistatic very high frequency (VHF)-band SAR images of truck vehicles in forested and urban terrain

Cited by 23 publications

References 15 publications

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

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

Phase Error Calculation for Fast Time-Domain Bistatic SAR Algorithms

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