AZIMUTH MULTICHANNEL SAR IMAGING BASED ON COMPRESSED SENSING
نویسندگان
چکیده
منابع مشابه
Azimuth Multichannel Sar Imaging Based on Compressed Sensing
Azimuth multichannel is a promising technique of realizing high resolution and wide swath for synthetic aperture radar (SAR) imaging, which consequently leads to extremely high data rate on satellite downlink system and confronts serious ambiguity in subsequent processing due to its strict limitation of pulse repetition frequency (PRF). Ambiguity suppression performance of conventional spectrum...
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The multichannel or wide-angle imaging performance of synthetic aperture radar (SAR) can be improved by applying the compressed sensing (CS) theory to each channel or sub-aperture image formation independently. However, this not only neglects the complementary information between signals of each channel or sub-aperture, but also may lead to failure in guaranteeing the consistency of the positio...
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Abstract—Synthetic Aperture Radar (SAR) can obtain a twodimensional image of the observed scene. However, the resolution of conventional SAR imaging algorithm based on Matched Filter (MF) theory is limited by the transmitted signal bandwidth and the antenna length. Compressed sensing (CS) is a new approach of sparse signals recovered beyond the Nyquist sampling constraints. In this paper, a hig...
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Next-generation spaceborne SAR systems pose demanding and contradicting requirements on system design, owing to the increasing need to cover ultra-wide swaths with high azimuth resolution, as required for numerous applications. To this end, a large number of multichannel SAR system concepts have been proposed that employ digital beamforming on receive with planar arrays, and more recently also ...
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Multilook processing is a widely used speckle reduction approach in synthetic aperture radar (SAR) imaging. Conventionally, it is achieved by incoherently summing of some independent low-resolution images formulated from overlapping subbands of the SAR signal. However, in the context of compressive sensing (CS) SAR imaging, where the samples are collected at sub-Nyquist rate, the data spectrum ...
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ژورنال
عنوان ژورنال: Progress In Electromagnetics Research
سال: 2013
ISSN: 1559-8985
DOI: 10.2528/pier13052205