期刊
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2022)
卷 -, 期 -, 页码 3772-3777出版社
IEEE
DOI: 10.1109/ICC45855.2022.9838764
关键词
extended reality (XR); terahertz (THz); reliability; sensing; joint sensing and communications
资金
- U.S. National Science Foundation [CNS-2007635, CNS-2008646, CNS-1836802]
- Velux Foundations, Denmark
- EUCHISTERA project LeadingEdge, CONNECT, 6G Flagship (6GENESIS)
A novel joint sensing and communication framework is proposed for wireless extended reality at terahertz bands, using reconfigurable intelligent surfaces as base stations. By leveraging sensing parameters and tensor decomposition, a high-resolution indoor mapping and increased system reliability are achieved.
Next-generation wireless systems are rapidly evolving from communication-only systems to multi-modal systems with integrated sensing and communications. In this paper a novel joint sensing and communication framework is proposed for enabling wireless extended reality (XR) at terahertz (THz) bands. To gather rich sensing information and a higher line-of-sight (LoS) availability, THz-operated reconfigurable intelligent surfaces (RISs) acting as base stations are deployed. The sensing parameters are extracted by leveraging THz's quasi-opticality and opportunistically utilizing uplink communication waveforms. This enables the use of the same waveform, spectrum, and hardware for both sensing and communication purposes. The environmental sensing parameters are then derived by exploiting the sparsity of THz channels via tensor decomposition. Hence, a high-resolution indoor mapping is derived so as to characterize the spatial availability of communications and the mobility of users. Simulation results show that in the proposed framework, the resolution and data rate of the overall system are positively correlated, thus allowing a joint optimization between these metrics with no tradeoffs. Results also show that the proposed framework improves the system reliability in static and mobile systems. In particular, the highest reliability gains of 10 % are achieved in a walking speed mobile environment compared to communication only systems with beam tracking.
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