Study of space borne SAR multidimensional waveform encoding technology based on azimuth multi-beams multi-phase centers

被引：0

作者：

Zeng, Xiang-Neng ^{[1
,2
]}

Liu, Xian-Xun ^{[1
]}

Bai, Jie ^{[1
]}

Zhang, Yong-Shun ^{[2
]}

机构：

[1] Aviation Meteorological and Chemical Defense Institute of Air Force Equipment Research Academe

[2] Missile Institute of Air Force Engineering University, Xi'an

来源：

Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2013年 / 41卷 / 09期

关键词：

High resolution wide swath imaging; Multidimensional waveform encoding; Multiple beams-multiple phase centers; Space borne SAR;

D O I：

10.3969/j.issn.0372-2112.2013.09.032

中图分类号：

学科分类号：

摘要：

This paper introduces a new waveform encoding technology on azimuth-fast time domain for space borne synthetic aperture radar (SAR), this technology can obtain high resolution wide swath imaging capacity by combining the azimuth multiple beams with multiple phase centers. On the transmitter, intrapulse scanning technolog is utilized to form multiple narrow beams on azimuth in this system, which can reduce the sub-doppler bandwidth, and the elevation beam is widened for wide imaging swath. On the receiver, multiple equivalent phase centers are produced both on azimuth and elevation, the range ambiguity is deducted as the result of multiple sub-waveforms separated by digital beam-forming (DBF) on elevation, and the azimuth doppler ambiguity is deducted by doppler spectral reconstruction method. Finally, the multiple sub-doppler spectra are combined to achieve high azimuth resolution. Moreover, the primary system parameters and performance advantage are analyzed. Simulation results confirm this new system can fulfill high resolution wide swath imaging, also within condensed configuration than other space borne SAR system.

引用

页码：1863 / 1868

页数：5

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