Range-Dependent Channel Calibration for High-Resolution Wide-Swath Synthetic Aperture Radar Imagery-Reference-Cited by-同舟云学术

Range-Dependent Channel Calibration for High-Resolution Wide-Swath Synthetic Aperture Radar Imagery

Published:2024-05-21 Issue:11 Volume:24 Page:3278
ISSN:1424-8220
Container-title:Sensors
language:en
Short-container-title:Sensors

Author:

Zhang Man¹²,Meng Zhichao³,Wang Guanyong⁴,Xue Yonghong⁵

Affiliation:

1. School of Electronic and Communication Engineering, Guangzhou University, Guangzhou 510006, China

2. Key Laboratory of On-Chip Communication and Sensor Chip, Guangdong Higher Education Institutes, Guangzhou 510006, China

3. School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen 518107, China

4. School of Information and Science, North China University of Technology, Beijing 100144, China

5. Beijing Institute of Tracking and Communication Technology, Beijing 100094, China

Abstract

High-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) imaging with azimuth multi-channel always suffers from channel phase and amplitude errors. Compared with spatial-invariant error, the range-dependent channel phase error is intractable due to its spatial dependency characteristic. This paper proposes a novel parameterized channel equalization approach to reconstruct the unambiguous SAR imagery. First, a linear model is established for the range-dependent channel phase error, and the sharpness of the reconstructed Doppler spectrum is used to measure the unambiguity quality. Furthermore, the intrinsic relationship between the channel phase errors and the sharpness is revealed, which allows us to estimate the optimal parameters by maximizing the sharpness of the reconstructed Doppler spectrum. Finally, the results from real-measured data show that the suggested method performs exceptionally for ambiguity suppression in HRWS SAR imaging.

Funder

Key Laboratory of On-Chip Communication and Sensor Chip of Guangdong Higher Education Institutes

Publisher

MDPI AG

Link

https://www.mdpi.com/1424-8220/24/11/3278/pdf

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