Imaging for MIMO Sliding Spotlight SAR Using Stepped Frequency Chirps

被引：0

作者：

Luo, Xiulian ^{[1
]}

Deng, Yunkai ^{[1
]}

Wang, Robert ^{[1
]}

Xu, Wei ^{[1
]}

Guo, Lei ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Elect, Beijing 100864, Peoples R China

来源：

10TH EUROPEAN CONFERENCE ON SYNTHETIC APERTURE RADAR (EUSAR 2014) | 2014年

关键词：

RESOLUTION;

D O I：

暂无

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

To achieve two-dimensional ultra high resolution and wide swath, this paper applies the stepped frequency chirps to the MIMO sliding spotlight SAR, where each subaperture transmits a different subband. During the imaging, multichannel reconstruction and bandwidth synthesis are embedded into the "two-step" focusing approach. Since the frequency range for each subband is different, a range-frequency-dependent reference function (FDRF) combined with chirp z-transform (CZT) is employed during the azimuth preprocessing. Moreover, the FDRF removes the residual Doppler bandwidth introduced by deramping with a range-frequency-independent reference function (FIRF). Simulation experiment is performed to validate the presented imaging approach.

引用

页数：4

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