Real-time Correction of Channel Amplitude and Phase Error in SAR System

doi:10.3969/j.issn.1006-2475.2019.08.009

Abstract

Abstract: The resolution of synthetic aperture radar is an important index to measure the performance of the system. Because of the amplitude and phase error in the transmitting and receiving channel of the system, the echo signal is distorted, and the corresponding pulse compression effect deteriorates, which affects the range resolution of SAR imaging. In order to correct the amplitude and phase error in real time, the correlation windowing method is used to extract the error, and a complex FIR filter is designed by complex Chebyshev approximation method. The results show that the corrected pulse compression effect is improved, and the corrected effect is related to the order of the filter. Finally, it is concluded that the PSLR and ISLR of the corrected pulse compression decrease with the increase of filter order, and gradually become stable.

Key words: synthetic aperture radar, channel amplitude and phase errors, real-time correction, complex FIR filter, Chebyshev approximation

CLC Number:

TN955

LI Chang1,2,ZHANG Zhi-min1 . Real-time Correction of Channel Amplitude and Phase Error in SAR System[J]. Computer and Modernization, doi: 10.3969/j.issn.1006-2475.2019.08.009.

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