| 摘要: |
| 随着物联网（IoT)技术和无线保真（Wi-Fi）协议的发展，Wi-Fi信道状态信息（CSI）陆续应用于医疗健康、室内定位、人员识别和安全检测等领域。其中，基于到达角（AoA）的室内定位方法取得了显著进展。然而，现有文献对基于Wi-Fi CSI的AoA估计技术的系统性研究仍显不足。基于此，对基于Wi-Fi CSI的AoA估计技术进行了综述。首先，介绍了Wi-Fi CSI的概念和特性；其次，汇总了现有无线电AoA估计方法并对其进行分类；然后，梳理了Wi-Fi CSI AoA估计可行技术路线中涉及的方法；最后，展望了未来的研究方向并总结全文。 |
| 关键词: 室内定位 无线保真 信道状态信息 到达角估计 综述 |
| DOI： |
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| 基金项目:国家自然科学基金(42401531,42001397）；山东省高等学校青创团队计划(2023KJ121)；山东省自然科学基金(ZR2024-QD012)；河北省燕赵黄金台聚才计划骨干人才项目（B2024005023)；河北省自然科学基金(D2024523007) |
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| Survey of angle of arrival estimation based on Wi-Fi channel state information |
| BI Jingxue,WU Xianghui,WANG Teng,ZHAO Meiqi,YU Baoguo,HUANG Lu,ZHANG Heng |
| (School of Surveying and Geo-Informatics, Shandong Jianzhu University, Jinan 250101, China; State Key Laboratory of Satellite Navigation System and Equipment Technology, The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China;School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China) |
| Abstract: |
| With the advancement of internet of things (IoT) technology and wireless fidelity (Wi-Fi) protocols, Wi-Fi channel state information (CSI) has been increasingly applied in various fields, including healthcare, indoor positioning, personal identification and security detection. Among these, the angle of arrival (AoA)-based indoor positioning method has made significant progress. However, systematic studies on AoA estimation methods based on Wi-Fi CSI are still lacking in the existing literature. Based on this, the AoA estimation techniques using Wi-Fi CSI are reviewed. First, the concepts and characteristics of Wi-Fi CSI are introduced. Next, the existing radio-based AoA estimation methods are summarized and categorized. Then, the methods involved in a feasible technical route for AoA estimation using Wi-Fi CSI is outlined. Finally, the future research directions in AoA estimation using Wi-Fi CSI are prospected and a summary is provided. |
| Key words: Indoor positioning Wireless fidelity(Wi-Fi) Channel state information(CSI) Angle of arrival(AoA) estimation Survey |
