A New Slant-Range Velocity Ambiguity Resolving Approach of Fast Moving Targets for SAR System

作者：Zhu, Shengqi^*; Liao, Guisheng; Qu, Yi; Liu, Xiangyang; Zhou, Zhengguang

来源：IEEE Transactions on Geoscience and Remote Sensing, 2010, 48(1): 432-451.

DOI：10.1109/TGRS.2009.2027698

• Ground moving target indication
• range frequency domain
• slant-range velocity estimation
• synthetic aperture radar (SAR)
• velocity ambiguity
• wavelength diversity

This paper describes an ambiguity resolving approach for slant-range velocity estimation which utilizes the wideband characteristic of the transmitted signal (multiple wavelengths). Based on the wavelength dual-wavelength radar data. Then, two effective approaches are introduced to focus the moving target no matter the Doppler ambiguity exists or not. The slant-range velocity is estimated by the number of azimuth cell displacements between the two focused images. Both imaging methods have different properties and advantages. A performance analysis is made, and deleterious factors in practice are analyzed in detail. The effectiveness of the unambiguous slant-range velocity estimation approach is demonstrated with the use of simulated and real data.

• 出版日期2010-1
• 单位中国人民武装警察部队工程大学; 中国人民解放军国防科学技术大学; 西安电子科技大学