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In this paper, we show that CSI feedback from a client to the AP can be used to recognize different fine-grained motions of the client. ... We find that CSI can not only identify if the client is in motion or not, but also classify different types of motions. ... Revising the CSI features for fewer samples such that motion detection accuracy is still high is also an interesting direction of future work. HotWireless'14, September 11, 2014, Maui, Hawaii, USA. ...doi:10.1145/2643614.2643620 dblp:conf/mobicom/ZengPXM14 fatcat:af2nrfhb3bac3lv2354tqxxe24