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Spotlight SAR data processing using the frequency scaling algorithm
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DOI：10.1109/36.789617.png)
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This paper presents a new processing algorithm for spotlight SAR data processing. The algorithm performs the range cell migration correction for non-chirped raw data without interpolation by using a novel frequency scaling operation. The azimuth processing is based on a spectral analysis approach which is made highly accurate by azimuth scaling. In almost all processing stages, a subaperture approach is introduced for efficient azimuth processing, In this paper, the complete derivation of the algorithm is presented. A very useful formulation for non-chirped SAR signals in range Doppler domain is also proposed where the residual video phase is ex-pressed by a chirp convolution. The algorithm performance is shown by several simulations. A spotlight image, which has been extracted from stripmap raw data of the experimental SAR system of DLR, shows the validity of the frequency scaling algorithm.
Keyword:
SUBAPERTURE
MIGRATION
AIRBORNE
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IF:
8.6
论文数:
2.1W
被引数:
10.7W
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