Image processing of SAL based on low sampling rate digital dechirp

doi:10.7523/j.issn.2095-6134.2016.05.013

Abstract

Abstract:

In this study, low sampling rate digital dechirp is used in SAL to decrease AD sampling rate of the system. On this basis, signal sampling and imaging processing are analyzed. To depress the influence of time delay error, a method for time delay error estimation is proposed. This method estimates time delay through dechirp with part of echo signal. To ensure the quality of pulse compression, a method based on RVP filtering is used to correct nonlinear distortion of the LFM signal. The feasibility of applying the low sampling rate digital dechirp in SAL is verified by simulations.

Key words: digital dechirp, SAL, AD sampling, time delay error, signal correcting, image processing

CLC Number:

TN958.98

HU Xuan, LI Daojing, ZHOU Jianwei. Image processing of SAL based on low sampling rate digital dechirp[J]. , 2016, 33(5): 664-668.

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Image processing of SAL based on low sampling rate digital dechirp

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