DOA estimation for movable antenna array systems under gain and phase errors

IF 2.2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2025-08-18 DOI:10.1016/j.phycom.2025.102808

Chengzhi Ye , Ruoyu Zhang , Changcheng Hu , Lei Yao , Wen Wu

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引用次数: 0

Abstract

Movable antenna (MA) technology has become a promising technology in the field of wireless communications. By adjusting the spatial position of the antennas in a confined region, more accurate direction-of-arrival (DOA) estimation can be achieved. This paper investigates the phase errors and gain fluctuations induced by the movement of MA during operation. We develop a method for DOA estimation in MA array systems affected by gain and phase errors. This method employs the covariance matrix of the array output signals to accurately estimate gain errors. By leveraging the Hadamard product of the covariance matrix, we extract quantities that are insensitive to phase errors, thereby enabling accurate DOA estimation. In addition, we analyze the impact of antenna positioning at various locations on performance, as well as the effect of movement distance on the antenna. Based on these analyses, we propose a straightforward linear array reconfiguration method. Simulation results indicate that under low signal-to-noise ratio (SNR) conditions, the rearranged array exhibits superior performance compared to traditional array setups.

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增益和相位误差下可移动天线阵系统的DOA估计

移动天线（MA）技术已成为无线通信领域中一个很有前途的技术。通过调整天线在受限区域内的空间位置，可以获得更精确的到达方向（DOA）估计。本文研究了在工作过程中由毫安运动引起的相位误差和增益波动。提出了一种受增益和相位误差影响的毫安阵列系统DOA估计方法。该方法利用阵列输出信号的协方差矩阵来准确估计增益误差。通过利用协方差矩阵的Hadamard积，我们提取对相位误差不敏感的量，从而实现准确的DOA估计。此外，我们分析了天线在不同位置的定位对性能的影响，以及移动距离对天线的影响。基于这些分析，我们提出了一种简单的线性阵列重构方法。仿真结果表明，在低信噪比条件下，重构阵列的性能优于传统阵列。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Communication ENGINEERING, ELECTRICAL & ELECTRONICTELECO-TELECOMMUNICATIONS

CiteScore

5.00

自引率

9.10%

发文量

212

审稿时长

55 days

期刊介绍： PHYCOM: Physical Communication is an international and archival journal providing complete coverage of all topics of interest to those involved in all aspects of physical layer communications. Theoretical research contributions presenting new techniques, concepts or analyses, applied contributions reporting on experiences and experiments, and tutorials are published. Topics of interest include but are not limited to: Physical layer issues of Wireless Local Area Networks, WiMAX, Wireless Mesh Networks, Sensor and Ad Hoc Networks, PCS Systems; Radio access protocols and algorithms for the physical layer; Spread Spectrum Communications; Channel Modeling; Detection and Estimation; Modulation and Coding; Multiplexing and Carrier Techniques; Broadband Wireless Communications; Wireless Personal Communications; Multi-user Detection; Signal Separation and Interference rejection: Multimedia Communications over Wireless; DSP Applications to Wireless Systems; Experimental and Prototype Results; Multiple Access Techniques; Space-time Processing; Synchronization Techniques; Error Control Techniques; Cryptography; Software Radios; Tracking; Resource Allocation and Inference Management; Multi-rate and Multi-carrier Communications; Cross layer Design and Optimization; Propagation and Channel Characterization; OFDM Systems; MIMO Systems; Ultra-Wideband Communications; Cognitive Radio System Architectures; Platforms and Hardware Implementations for the Support of Cognitive, Radio Systems; Cognitive Radio Resource Management and Dynamic Spectrum Sharing.