30 March 2017 Array error estimation method for multichannel synthetic aperture radar systems in azimuth
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Abstract
Multichannel synthetic aperture radar systems are usually employed to suppress azimuth ambiguity and realize high-resolution wide-swath imaging. However, unavoidable array errors will significantly degrade the performance of ambiguity suppression and imaging quality. This paper presents an array error estimation method based on cross correlation. First, unambiguous Doppler spectra are obtained by selecting a short length of range profiles from strong targets. Then, array errors are estimated by a proposed cross-correlation method. Finally, a preprocessing method to improve the estimation accuracy is proposed. The proposed method takes full advantage of the training samples from strong targets and estimates array errors by the coherent integration technique, which improves the estimation accuracy and robustness. Theoretical analysis and experiments based on simulations and measurements showed the validity of the proposed method, especially in low signal-to-noise ratios.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiaojiang Guo, Xiaojiang Guo, Yesheng Gao, Yesheng Gao, Kaizhi Wang, Kaizhi Wang, Xingzhao Liu, Xingzhao Liu, } "Array error estimation method for multichannel synthetic aperture radar systems in azimuth," Journal of Applied Remote Sensing 11(1), 015027 (30 March 2017). https://doi.org/10.1117/1.JRS.11.015027 . Submission: Received: 10 November 2016; Accepted: 14 March 2017
Received: 10 November 2016; Accepted: 14 March 2017; Published: 30 March 2017
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