Nonlinear CS algorithms for forward-squint SAR imaging

Liu Guangyan; Huang Shunji

Volume 25 Issue 10

Oct. 2003

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Article Navigation > Journal of Electronics & Information Technology > 2003 > 25(10): 1308-1315

Liu Guangyan, Huang Shunji. Nonlinear CS algorithms for forward-squint SAR imaging[J]. Journal of Electronics & Information Technology, 2003, 25(10): 1308-1315.

Citation:

Liu Guangyan, Huang Shunji. Nonlinear CS algorithms for forward-squint SAR imaging[J]. Journal of Electronics & Information Technology, 2003, 25(10): 1308-1315.

Liu Guangyan, Huang Shunji. Nonlinear CS algorithms for forward-squint SAR imaging[J]. Journal of Electronics & Information Technology, 2003, 25(10): 1308-1315.

Citation:

Liu Guangyan, Huang Shunji. Nonlinear CS algorithms for forward-squint SAR imaging[J]. Journal of Electronics & Information Technology, 2003, 25(10): 1308-1315.

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Nonlinear CS algorithms for forward-squint SAR imaging

Liu Guangyan^{①②;黄顺吉},
Huang Shunji

Received Date: 2002-03-18
Rev Recd Date: 2002-09-23
Publish Date: 2003-10-19

Abstract

Abstract

Based on the forward-squint-looking SAR mode of SAR system, this paper gives the mathematical model of SAR echo signal, and carefully analyses the instantaneous azimuth frequency , the instantaneous Doppler frequency component of the azimuth frequency and the impact of range chirp on azimuth frequency, then combining with the common chirp scal-ing algorithms, proposes an improved chirp scaling algorithm for forward-squint-looking SAR, imaging, and takes the simulated test with the algorithm. The results of theory and simula-tion show that the way is more reasonable for forward-squint-looking SAR geometric relation and can effectively complete range cell migration correction, range compression and azimuth focusing, and improve images quality.

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References(1)

References

R.K. Raney, H. Runge, Precision SAR processing using chirp scaling, IEEE Trans. on GRS,1994, GRS-32(4), 786-799.[2]R. Keith Raney, An exact wide field digital imaging algorithm, Int. J. Remote Sensing, 1992,13(5), 991-998.[3]Sun Xiaobing, Yeo Tat Son, The impact of range chirp scaling algorithm, In Proc. IEEE GRS.Symp., IGARSS99, Hanburg, Germany, Jan. 1999, 556-558.[4]R. Keith Raney.[J].A new and fundamental Fourier transform pair, In Proc. IGARSS92, Houston,TX, USA.1992,:-[5]Al. Moreira, Yonghong Huang, Airborne SAR processing of highly squinted data using a chirpscaling approach with Integrated motion compensation, IEEE Trans. on GRS, 1994, GRS-32(5),1029-1040.[6]G.W. Davidson, I. G. Cumming, M. R. Ito, A chirp scaling approach for processing squint modeSAR data, IEEE Trans. on AES, 1996 AES-32(1), 121-133.

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