High-Precision DOA Estimation Method Based on Synthetic Aperture Technique

被引：0
|
作者：
Dou Y. [1 ]
Sun G. [1 ]
Wang Y. [2 ]
Xing M. [1 ]
机构：
[1] National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an
[2] School of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an
来源：
Journal of Beijing Institute of Technology (English Edition) | 2024年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
coherent accumulation; direction-of-arrival (DOA) estimation; synthetic aperture;
D O I：
10.15918/j.jbit1004-0579.2023.130
中图分类号：
学科分类号：
摘要：
The existing direction-of-arrival (DOA) estimation methods only utilize the current received signals, which are susceptible to noise. In this paper, a method for DOA estimation based on a motion platform is proposed to achieve high-precision DOA estimation by utilizing past and present signals. The concept of synthetic aperture is introduced to construct a linear DOA estimation model. A DOA fine-tuning method based on the linear model is proposed to eliminate the linear DOA variation, achieving a non-coherent accumulation of DOA estimations. Moreover, the baseband modulation and the phase modulation caused by the range history are compensated to achieve the coherent accumulation of all the DOA estimations. Simulation results show that the proposed method can significantly improve the DOA estimated accuracy at low signal-to-noise ratios (SNR). © 2024 Beijing Institute of Technology. All rights reserved.
引用
收藏
页码：111 / 118
页数：7
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