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Target height and multipath attenuation joint estimation with complex scenarios for very high frequency radar

Target height and multipath attenuation joint estimation with complex scenarios for very high... Low-angle estimation for very high frequency (VHF) radar is a difficult problem due to the multipath effect in the radar field, especially in complex scenarios where the reflection condition is unknown. To deal with this problem, we propose an algorithm of target height and multipath attenuation joint estimation. The amplitude of the surface reflection coefficient is estimated by the characteristic of the data itself, and it is assumed that there is no reflected signal when the amplitude is very small. The phase of the surface reflection coefficient and the phase difference between the direct and reflected signals are searched as the same part, and this represents the multipath phase attenuation. The Cramer-Rao bound of the proposed algorithm is also derived. Finally, computer simulations and real data processing results show that the proposed algorithm has good estimation performance under complex scenarios and works well with only one snapshot. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Frontiers of Information Technology & Electronic Engineering Springer Journals

Target height and multipath attenuation joint estimation with complex scenarios for very high frequency radar

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References (22)

Publisher
Springer Journals
Copyright
Copyright © Zhejiang University Press 2022
ISSN
2095-9184
eISSN
2095-9230
DOI
10.1631/fitee.2100003
Publisher site
See Article on Publisher Site

Abstract

Low-angle estimation for very high frequency (VHF) radar is a difficult problem due to the multipath effect in the radar field, especially in complex scenarios where the reflection condition is unknown. To deal with this problem, we propose an algorithm of target height and multipath attenuation joint estimation. The amplitude of the surface reflection coefficient is estimated by the characteristic of the data itself, and it is assumed that there is no reflected signal when the amplitude is very small. The phase of the surface reflection coefficient and the phase difference between the direct and reflected signals are searched as the same part, and this represents the multipath phase attenuation. The Cramer-Rao bound of the proposed algorithm is also derived. Finally, computer simulations and real data processing results show that the proposed algorithm has good estimation performance under complex scenarios and works well with only one snapshot.

Journal

Frontiers of Information Technology & Electronic Engineering – Springer Journals

Published: Jun 1, 2022

Keywords: Low-angle estimation; Very high frequency (VHF) radar; Complex scenarios; Multipath effect; Height estimation; TN95; 低角估计; 甚高频雷达; 复杂场景; 多径效应; 高度估计

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