Using Iterative-Based Methods in Multiple-Input Multiple-Output Synthetic Aperture Radar for Target-Image Separation

Document Type : Original Article

Authors

1 PhD student, Sharif University of Technology, Tehran, Iran

2 Professor, Sharif University of Technology, Tehran, Iran

Abstract

Estimating the angle of arrival of waves in the low-altitude scenario is a challenging issue in the field of phased array radars. This problem generally occurs when a target moves at low altitude, and the signal received directly from the target coincides with the signal received from its reflection off the ground, simultaneously entering the receiver and disrupting the angle estimation. Many articles have investigated and addressed this issue in phased array radars using high-resolution separation methods. In this paper, we focus on solving this problem in multiple-input multiple-output radars. Specifically, we concentrate on impulse and synthetic aperture radars. The proposed method consists of two steps: first, the range, azimuth angle, and approximate elevation angle of the target are estimated using a matched filter; then, the proposed method is applied around the detected elevation angle to separate the target from its image. The term "image" refers to the reflection of a target from the ground surface, which creates a false target in the receiver. The results obtained demonstrate that the proposed method is capable of effectively separating the target from its image under various conditions.

Keywords

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Radar
Volume 10, Issue 2 - Serial Number 28
Number 28, Autumn and Winter Quarterly
January 2023
Pages 31-38

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History

  • Receive Date: 24 October 2022
  • Revise Date: 14 December 2022
  • Accept Date: 31 December 2022
  • Publish Date: 21 January 2023

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