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发表刊物：IEEE Transactions on Vehicular Technology
摘要：Hand gesture recognition through wireless sensing is a new method of human-machine interaction, and is an important research direction for next generation integrated sensing and communication systems. Recently, although there are plenty of works on wireless sensing and hand gesture recognition, most of them are applied in single user scenario. Since the recognition algorithm is mainly realized by analyzing the variation of wireless propagation channel, the simultaneous movement of multiple people will cause superposition of the dynamic channel responses and cause interference to each other. This paper proposes to use spatial beamforming to alleviate the mutual influence of multiuser hand gestures. Since the hands of multiple users reflect the same signal, the channel responses are usually not orthogonal even if the users are well separated in different locations, and there is no reference signals to help distinguishing the channel response reflected by different users. We propose a preamble gesture scheme to estimate the spatial channel of dynamic reflections under the impact of strong phase noise, and use the Doppler variation feature to verify the channel response belongs to hand movement. We have a thorough analysis of the inter-user interference impacted by the transmitter-user-receiver geometry relations, user movement speeds and directions. The interference suppression effect is demonstrated by prototype experiments under real LOS and NLOS scenarios exploiting LTE signals.
论文类型：期刊论文
一级学科：信息与通信工程
文献类型：期刊
卷号：72
期号：1
页面范围：805-820
是否译文：否
发表时间：2023-01-01
收录刊物：SCI
发布期刊链接：https://ieeexplore.ieee.org/document/9882522