DBS多普勒中心无模糊估计新方法

doi:10.3969/j.issn.1001-2400.2011.05.027

Abstract

Abstract:

Doppler centroid, a foundational parameter of Doppler Beam Sharpening (DBS), needs to be estimated from echoes. Traditional estimated methods have a shortcoming of the ambiguity to pulse repetition frequency (PRF). The inaccuracy of Doppler centroid resulting from inertial navigation units measurement errors when resolving the ambiguity declines the quality of an image. A novel method has been proposed in this paper to estimate the Doppler centroid without ambiguity. According to the constant speed rotation of the antenna, from the expression for the coherent echoes, two parameters can be estimated, i.e., initial azimuth angle of the first echo in the coherent echoes, and the product of the velocity of plane and the cosine of elevation angle. Then Doppler centroid of the coherent echoes will be calculated from them without ambiguity. The results of computer simulation and the processing results of real DBS data prove the effectiveness of the processing procedure.

Key words: Doppler beam sharpening, Doppler centroid, mechanical scanning, parameter estimation

ZUO Lei;LI Ming;ZHANG Xiaowei. Doppler centroid estimation without ambiguity in DBS[J].J4, 2011, 38(5): 165-171.

References

［1］赵宏钟, 谢华英, 周剑雄, 等. 匀加速运动平台下的大斜视DBS成像方法［J］. 电子学报, 2010, 38(6): 1280-1286.
Zhao Hongzhong, Xie Huaying, Zhou Jianxiong, et al. High Squint DBS Imaging Based on Constant Acceleration Movement Platform［J］. Acta Electronica Sinaca, 2010, 38(6): 1280-1286.
［2］ Li F K, Held D N. Doppler Parameter Estimation for Spaceborne Synthetic-aperture Radars ［J］. IEEE Trans on Geosci Remote Sens, 1985, 23(1): 47-56.
［3］ Mallat S G. Multifrequency Channel Decompositions of Images and Wavelet Models ［J］. IEEE Trans on Acoustics, Speech and Signal Processing, 1989, 37(2): 2091-2110.
［4］ Carrara W G, Goddman R S, Majewski R M. Spotlight Synthetic Aperture Radar. Signal Processing Algorithms ［M］. Boston: Artech House, 1995: 458-459.
［5］ Curlander J C. Synthetic Aperture Radar System and Signal Processing ［M］. New York: John Wiley ＆ Sons, 1991.
［6］ Wei Song, Fang Zhihong, Wang Hongyuan. An Improved Method of Doppler Centroid Estimation in SAR ［C］//IEEE International Geoscience and Remote Sensing Symposium Proceedings. Anchorage: IEEE, 2004: 1530-1533.
［7］李燕平, 邢孟道, 保铮. 宽带机械扫描雷达的DBS成像和动目标检测［J］. 西安电子科技大学学报, 2006, 33(1): 116-128.
Li Yanping, Xing Mengdao, Bao Zheng. DBS Imaging and GMTI in a Wideband Airborne Mechanic Scanning Radar ［J］. Journal of Xidian University, 2006, 33(1): 116-128.
［8］魏红亮, 李明. 一种快速的DBS多普勒中心估计方法［J］. 制导与引信, 2009, 30(1): 42-45.
Wei Hongliang, Li Ming. A Fast DBS Doppler Center Estimation Method ［J］. Guidance ＆ Fuze, 2009, 30(1): 42-45.
［9］孙泓波, 顾红, 苏卫民, 等. 机载雷达成像中两种改进多普勒质心估计算法［J］. 兵工学报, 2002, 23(1): 49-53.
Sun Hongbo, Gu Hong, Su Weimin, et al. Two Improved Doppler Centroid Estimation Techniques in Imaging through Doppler Beam Sharpening ［J］. Acta Armamentarii, 2002, 23(1): 49-53.
［10］程玉平, 保铮. 一种改进的多普勒中心频率估计方法［J］. 西安电子科技大学学报, 1999, 26 (1): 44-48.
Cheng Yuping, Bao Zheng. An Improved Method for the Estimation of the Doppler Centroid Frequency ［J］. Journal of Xidian University, 1999, 26(1): 44-48.
［11］吴建新, 王彤, 索志勇. 机载高重复频率雷达多普勒中心估计方法［J］. 西安电子科技大学学报, 2009, 36(3): 396-400.
Wu Jianxin, Wang Tong, Suo Zhiyong. Method for Doppler Centroid Estimation of Airborne Radar with a High Pulse Repetition Frequency ［J］. Journal of Xidian University, 2009, 36(3): 396-400.
［12］丁有生, 张碧雄. 一种DBS多普勒中心的估计算法［J］. 测绘科学技术学报, 2008, 25(3):176-182.
Ding Yousheng, Zhang Bixiong. Arithmetic Estimation of DBS Doppler Center ［J］. Journal of Geomatics Science and Technology, 2008, 25(3): 176-182.
［13］ Wei Meng, Kong Lingjiang. Feature Extraction Method for Micro-Doppler Using LFM ［C］//Proc of APSAR. Xi'an: IEEE, 2009: 792-795.

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Doppler centroid estimation without ambiguity in DBS

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