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- W2143228105 abstract "The spatial features of emitted wireless signals are the basis of location distinction and determination for wireless indoor localization. Available in mainstream wireless signal measurements, the Received Signal Strength Indicator (RSSI) has been adopted in vast indoor localization systems. However, it suffers from dramatic performance degradation in complex situations due to multipath fading and temporal dynamics. Break-through techniques resort to finer-grained wireless channel measurement than RSSI. Different from RSSI, the PHY layer power feature, channel response, is able to discriminate multipath characteristics, and thus holds the potential for the convergence of accurate and pervasive indoor localization. Channel State Information (CSI, reflecting channel response in 802.11 a/g/n) has attracted many research efforts and some pioneer works have demonstrated submeter or even centimeter-level accuracy. In this article, we survey this new trend of channel response in localization. The differences between CSI and RSSI are highlighted with respect to network layering, time resolution, frequency resolution, stability, and accessibility. Furthermore, we investigate a large body of recent works and classify them overall into three categories according to how to use CSI. For each category, we emphasize the basic principles and address future directions of research in this new and largely open area." @default.
- W2143228105 created "2016-06-24" @default.
- W2143228105 creator A5011140675 @default.
- W2143228105 creator A5061103594 @default.
- W2143228105 creator A5070071735 @default.
- W2143228105 date "2013-11-01" @default.
- W2143228105 modified "2023-10-14" @default.
- W2143228105 title "From RSSI to CSI" @default.
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- W2143228105 doi "https://doi.org/10.1145/2543581.2543592" @default.
- W2143228105 hasPublicationYear "2013" @default.
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