Please use this identifier to cite or link to this item: https://doi.org/10.1109/36.921413
Title: A new subaperture approach to high squint SAR processing
Authors: Yeo, T.S. 
Tan, N.L.
Zhang, C.B. 
Lu, Y.H. 
Keywords: High squint SAR
Subaperture approach
Issue Date: May-2001
Source: Yeo, T.S.,Tan, N.L.,Zhang, C.B.,Lu, Y.H. (2001-05). A new subaperture approach to high squint SAR processing. IEEE Transactions on Geoscience and Remote Sensing 39 (5) : 954-968. ScholarBank@NUS Repository. https://doi.org/10.1109/36.921413
Abstract: In this paper, a high squint subaperture (HSS) algorithm was developed from the perspective of a stripmap synthetic aperture radar (SAR) system and has the ability to focus SAR data at extremely high squint angle of 55° with less than 1.27% mainlobe expansion or even higher squint angles if larger mainlobe expansion can be tolerated. The unique characteristic of this algorithm is that the subapertures are formed by multiplying the received signal with a set of overlapped complex conjugated reference signals where the chirp rate varies in the azimuth direction. This is done to solve the range focus problem that arises after the azimuth input signal undergoes the range walk removal procedure. As the HSS algorithm only involves short fast Fourier transforms (FFTs) and avoids interpolation, it is computationally efficient and allows for small data buffers and facilitates hardware real-time implementation. The distinct feature of this algorithm is its simplicity of implementation, which is vital in real time processing and motion compensation when the squint angle may be changing continuously.
Source Title: IEEE Transactions on Geoscience and Remote Sensing
URI: http://scholarbank.nus.edu.sg/handle/10635/54546
ISSN: 01962892
DOI: 10.1109/36.921413
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