ZUO Wei-hua, PI Yi-ming, MIN Rui. Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR[J]. Acta Electronica Sinica, 2013, 41(9): 1716-1723.
ZUO Wei-hua, PI Yi-ming, MIN Rui. Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR[J]. Acta Electronica Sinica, 2013, 41(9): 1716-1723. DOI: 10.3969/j.issn.0372-2112.2013.09.008.
In this paper the range walk correction in time domain is introduced to revise the range compressing of the traditional frequency scaling algorithm.In the azimuth compressing
a method named azimuth nonlinear chirp scaling is involved to solve the azimuth position dependence of the azimuth modulation rate introduced by the range walk correction.The simulation experiments verify the correct and validity of the proposed algorithm in focusing the echo of high squint spotlight SAR.