高信噪比、高分辨宽测绘带成像

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2010, Vol. 31 ›› Issue (5): 958-967.

• Avionics and Autocontrol • Previous Articles Next Articles

High Signal to Noise Ratio and High Resolution Wide Swath Imaging

Wu Qisong¹; Shi Hongzhu²; Xing Mengdao¹; Bao Zheng¹

1. National Key Laboratory of Radar Signal Processing, Xidian University2．Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China, Xidian University,

Received:2009-04-13 Revised:2009-10-30 Online:2010-05-25 Published:2010-05-25
Contact: Wu Qisong

Abstract

Abstract: With respect to the contradictions between high azimuth resolution and wide swath, as well as high azimuth resolution and high signal to noise ratio (SNR), a two-dimensional (2D) spatial combination algorithm is presented to achieve high SNR, high resolution and wide swath imaging based on plane-array synthetic aperture radar (SAR) system with intrapulse scanning technique. First, the model of plane-array SAR system with intrapulse scanning technique is built. Low pulse repetition frequency (PRF) is used to acquire the information of wide swath, and intrapulse scanning technique is adopted to obtain echoes with high SNR. With respect to the Doppler ambiguities caused by low PRF sampling wide Doppler spectrum (corresponding to high azimuth resolution) and the range ambiguities caused by the intrapulse scanning technique, a 2D spatial combination algorithm is presented to solve the range ambiguities and Doppler ambiguities at the same time. Meanwhile the effect of the scene fluctuation on this algorithm is analyzed in detail. Finally, simulation results verify the effectiveness of the proposed algorithm.

Key words: synthetic aperture radar, digital beam forming, wide swath imaging, signal to noise ratio, intrapulse scanning

CLC Number:

Wu Qisong;Shi Hongzhu;Xing Mengdao;Bao Zheng. High Signal to Noise Ratio and High Resolution Wide Swath Imaging[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2010, 31(5): 958-967.

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High Signal to Noise Ratio and High Resolution Wide Swath Imaging

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