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- 2018
基于Wi-Fi信道状态信息的室内定位技术现状综述
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Abstract:
室内定位技术一直是工业界和学术界的研究热点，Wi-Fi信号作为重要的定位源，长期受到研究人员的关注。传统的利用接收信号强度的Wi-Fi定位方法受到诸多限制，容易受到环境等因素的影响，精度难以有效提升，也无法展开大规模的应用。信道状态信息（channel state information，CSI）是一种比接收信号强度更能描述Wi-Fi信号传播本质的观测量，利用CSI进行室内定位研究已得到越来越多的关注。介绍了CSI基本概念，综述了现有基于CSI的各类定位方法，包括指纹匹配、测角和测距等，分别描述其基本原理，指出其中的优缺点，并分析其现状和难点。并对基于Wi-Fi信道状态信息的定位技术未来的发展方向进行了展望
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