Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/167352
Title: Precise Calibration of Channel Imbalance for Very High Resolution SAR With Stepped Frequency
Authors: Xiangyu Wang;Robert Wang;Yunkai Deng;Pei Wang;Ning Li;Weidong Yu;Wei Wang
Year: 2017
Publisher: IEEE
Abstract: Synthetic aperture radar (SAR) images require a high-resolution system for accurate interpretations. This high range resolution can be achieved by stepped frequency chirp signals. To reconstruct a wideband waveform from each subband signal, amplitude/phase/delay imbalance between the channels should be precisely compensated. In this paper, the system configuration is first presented. Further, a calibration strategy was proposed based on three calibration loops: the reference calibration, transmitting calibration, and receiving calibration loops for coarsely compensating the channel imbalance. Then, two different methods based on the cost functions were proposed to remove the residual channel imbalance. The proposed methods were validated using stepped frequency SAR data acquired by an X-band airborne SAR system with a total bandwidth of 3.6 GHz, yielding (unweighted) a 3-dB range resolution of 4 cm.
URI: http://localhost/handle/Hannan/167352
volume: 55
issue: 8
More Information: 4252,
4261
Appears in Collections:2017

Files in This Item:
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7930499.pdf6.18 MBAdobe PDF
Title: Precise Calibration of Channel Imbalance for Very High Resolution SAR With Stepped Frequency
Authors: Xiangyu Wang;Robert Wang;Yunkai Deng;Pei Wang;Ning Li;Weidong Yu;Wei Wang
Year: 2017
Publisher: IEEE
Abstract: Synthetic aperture radar (SAR) images require a high-resolution system for accurate interpretations. This high range resolution can be achieved by stepped frequency chirp signals. To reconstruct a wideband waveform from each subband signal, amplitude/phase/delay imbalance between the channels should be precisely compensated. In this paper, the system configuration is first presented. Further, a calibration strategy was proposed based on three calibration loops: the reference calibration, transmitting calibration, and receiving calibration loops for coarsely compensating the channel imbalance. Then, two different methods based on the cost functions were proposed to remove the residual channel imbalance. The proposed methods were validated using stepped frequency SAR data acquired by an X-band airborne SAR system with a total bandwidth of 3.6 GHz, yielding (unweighted) a 3-dB range resolution of 4 cm.
URI: http://localhost/handle/Hannan/167352
volume: 55
issue: 8
More Information: 4252,
4261
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7930499.pdf6.18 MBAdobe PDF
Title: Precise Calibration of Channel Imbalance for Very High Resolution SAR With Stepped Frequency
Authors: Xiangyu Wang;Robert Wang;Yunkai Deng;Pei Wang;Ning Li;Weidong Yu;Wei Wang
Year: 2017
Publisher: IEEE
Abstract: Synthetic aperture radar (SAR) images require a high-resolution system for accurate interpretations. This high range resolution can be achieved by stepped frequency chirp signals. To reconstruct a wideband waveform from each subband signal, amplitude/phase/delay imbalance between the channels should be precisely compensated. In this paper, the system configuration is first presented. Further, a calibration strategy was proposed based on three calibration loops: the reference calibration, transmitting calibration, and receiving calibration loops for coarsely compensating the channel imbalance. Then, two different methods based on the cost functions were proposed to remove the residual channel imbalance. The proposed methods were validated using stepped frequency SAR data acquired by an X-band airborne SAR system with a total bandwidth of 3.6 GHz, yielding (unweighted) a 3-dB range resolution of 4 cm.
URI: http://localhost/handle/Hannan/167352
volume: 55
issue: 8
More Information: 4252,
4261
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7930499.pdf6.18 MBAdobe PDF