Fast time domain approach for bistatic forward-looking sar imaging based on subaperture processing and local beamforming

Xie, Hongtu; Shi, Shuaiyi; Li, Fuhai; An, Daoxiang; Xiao, Hui; Xie, Chao; Fang, Qunle; Wang, Guangxue; Wang, Libao; Feng, Weike; Wang, Guoqian; Hang, Xiaotao; Zhang, Zhimin

doi:10.1109/icfst.2017.8210511

Cited by 2 publications

(23 citation statements)

References 7 publications

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“…r T (η) = (x T (η), y T (η), z T (η)) and r R (η) = (x R (η), y R (η), z R (η)) are the positions of the transmitter and the receiver at slow time η, respectively. Without loss of generality, in this geometric configuration, the receiver operates in the side-looking spotlight mode, while the transmitter operates in the forward-looking spotlight mode [49]. Provided that the transmitter's illuminating beam is always covered by the receiver's illuminating beam to insure the synchronization of this P-band UWB BSAR system [49].…”

Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

“…Without loss of generality, in this geometric configuration, the receiver operates in the side-looking spotlight mode, while the transmitter operates in the forward-looking spotlight mode [49]. Provided that the transmitter's illuminating beam is always covered by the receiver's illuminating beam to insure the synchronization of this P-band UWB BSAR system [49]. Suppose that P is an arbitrary scatterer in the illuminated scene, with the position r P = (x P , y P , 0).…”

Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

“…Suppose that P is an arbitrary scatterer in the illuminated scene, with the position r P = (x P , y P , 0). Thus, the bistatic distance from the scatterer P to the transmitter and receiver at the slow time η is [49]…”

Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

“…In order to improve the reconstruction efficiency, the efficient realization of the bistatic BP method was studied, i.e., bistatic fast factorized BP (FFBP) method [42]- [49], which was developed from the corresponding monostatic FFBP method [50]. Author of [42] first extended the FFBP method to reconstruction the one stationary BSAR raw data, but didn't provide the relational experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the presented method not only can precisely handles the P-band UWB BSAR raw data of the huge amount, big spatial-variance, significant range-azimuth coupling and complicated motion error, but also keep the accuracy and robust of the FDR strategy but with a reduced computational complexity. A part of this work has been published in [49] and [51].…”

Section: Introductionmentioning

confidence: 99%

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High-Efficiency and High-Precision Reconstruction Strategy for P-Band Ultra-Wideband Bistatic Synthetic Aperture Radar Raw Data Including Motion Errors

Xie

Duan

et al. 2020

IEEE Access

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P-band ultra-wideband bistatic synthetic aperture radar (UWB BSAR) has the well capability of the foliage penetrating, high-resolution imaging and adding the scattered information, which is potential of detecting the concealed target. However, the P-band UWB BSAR raw data is of the huge amount, big spatial-variance, significant range azimuth coupling and complicated motion error, which increases the difficulty of the efficient and precise reconstruction. In this paper, we propose a reconstruction strategy for the P-band UWB BSAR raw data including the motion errors, which can solve the above problems with the high-efficiency and high-precision. This method requires the local beamforming from the raw data as an intermediate processing in the slant range plane instead of ground plane, which can be exactly referenced to the tracks of the transmitter and receiver considering platform altitudes. And, it derives the requirement for selecting the subapertures and subimages by analyzing the bistatic range error considering the motion errors, as well as sampling requirement of the beam for the subimages, which offers a near-optimum tradeoff between the precision and efficiency. Simulated and measured results show that the proposed strategy is effective, and can achieve the near optimal performance with the low computational complexity. INDEX TERMS Bistatic synthetic aperture radar (BSAR), fast factorized backprojection (FFBP), high-efficiency and high-precision reconstruction, motion errors, P-band ultra-wideband.

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Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

Section: Bistatic Bp Methods For P-band Uwb Bsar a Geometric Confmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High-Efficiency and High-Precision Reconstruction Strategy for P-Band Ultra-Wideband Bistatic Synthetic Aperture Radar Raw Data Including Motion Errors

Xie

Duan

et al. 2020

IEEE Access

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An Improved UAV Bi-SAR Imaging Algorithm with Two-Dimensional Spatial Variant Range Cell Migration Correction and Azimuth Non-Linear Phase Equalization

Yan

et al. 2023

Remote Sensing

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The transmitter and receiver of unmanned aerial vehicle (UAV) bistatic synthetic aperture radar (Bi-SAR) are respectively carried on different UAV platforms, which has the advantages of flexible movement and strong concealment, and has broad application prospects in remote sensing fields. However, the range cell migration (RCM) and azimuth non-linear phase (ANP) of UAV Bi-SAR are seriously spatially variant along the range and azimuth directions, while the UAV Bi-SAR has a short operating range, complex trajectory and wide azimuth beam. Aiming at the problem that the RCM and ANP of UAV Bi-SAR in spotlight mode are difficult to correct and equalize due to the severe two-dimensional (2D) spatial variation, an RCM correction (RCMC) and ANP equalization (ANPE) method based on Doppler domain blocking is proposed. First, the azimuth spatial variance of RCM is eliminated by Doppler blocking, and the range spatial variant RCMC is realized by RNCS. Second, by combining Doppler blocking with azimuth nonlinear chirp scaling (ANCS), this method can adapt to ANPE with larger width and more severe spatial variation. At last, the criteria of Doppler blocking are given in detail, and the effectiveness of the proposed method is verified by UAV Bi-SAR real data and computer simulation.

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Fast time domain approach for bistatic forward-looking sar imaging based on subaperture processing and local beamforming

Cited by 2 publications

References 7 publications

High-Efficiency and High-Precision Reconstruction Strategy for P-Band Ultra-Wideband Bistatic Synthetic Aperture Radar Raw Data Including Motion Errors

High-Efficiency and High-Precision Reconstruction Strategy for P-Band Ultra-Wideband Bistatic Synthetic Aperture Radar Raw Data Including Motion Errors

An Improved UAV Bi-SAR Imaging Algorithm with Two-Dimensional Spatial Variant Range Cell Migration Correction and Azimuth Non-Linear Phase Equalization

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