首页|High-Precision DOA Estimation Method Based on Synthetic Aperture Technique

High-Precision DOA Estimation Method Based on Synthetic Aperture Technique

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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 estima-tion model. A DOA fine-tuning method based on the linear model is proposed to eliminate the lin-ear 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).

synthetic aperturedirection-of-arrival (DOA) estimationcoherent accumulation

Yongjia Dou、Guangcai Sun、Yuqi Wang、Mengdao Xing

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National Key Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China

School of Communication and Information Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

National Science Fund for Excellent Young Scholars国家自然科学基金stabilization support of National Radar Signal Processing Laboratory中央高校基本科研业务费专项

62222113U22B2015KGJ202203ZDRC2004

2024

10.15918/j.jbit1004-0579.2023.130

北京理工大学学报(英文版)
北京理工大学

北京理工大学学报(英文版)

影响因子：0.168
ISSN：1004-0579
年,卷(期)：2024.33(2)
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