多维波形编码信号大测绘带成像

Abstract

Abstract:

A novel approach described in the paper is the Wide Swath Imaging with Multidimensional Waveform Encoding Based on Multiple-Input Multiple-Output Synthetic Aperture Radar (MIMO-SAR). First, the concept of Multidimensional Waveform Encoding is introduced; then in the process of signals transmission, arrays in elevation is used to generate beamforming to scan different subswaths, and they can properly design the system parameters in order to restrict time-delay of the echoes from the near subswaths to the far sub-swath, As a result, the radar echoes from different subswaths would overlap in the receiver; range ambiguities must occur; finally digital beamforming is used to remove range ambiguities. The approach can be used to realize consecutive wide swath, and it overcomes the disadvantage that non-consecutive wide swath occurs by the conventional elevation multi-beam. At the same time it holds the abilities of flexible power distribution and of the multiple range resolution. It not only overcomes the shortcoming of low echoes power which appears in traditional wide swath imaging, but also breaks through the disadvantage of single range resolution in the processing of traditional imaging.

Key words: synthetic aperture radar (SAR), MIMO-SAR system, multidimensional waveform encoding, wide swath, range ambiguity

CLC Number:

TN972.3

WU Qi-song;JING Wei;XING Meng-dao;BAO Zheng. Wide swath imaging with multidimensional waveform encoding[J].J4, 2009, 36(5): 801-806+845.

References

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Wide swath imaging with multidimensional waveform encoding

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