计算机科学
电信线路
传输(电信)
架空(工程)
频道(广播)
反射(计算机编程)
能量(信号处理)
到达方向
电子工程
无线
天线(收音机)
计算机网络
电信
工程类
统计
数学
程序设计语言
操作系统
作者
Cheng Luo,Jie Hu,Luping Xiang,Kun Yang
出处
期刊:Cornell University - arXiv
日期:2023-10-20
标识
DOI:10.1109/tcomm.2023.3337257
摘要
This paper presents a reconfigurable intelligent sensing surface (RISS) that combines passive and active elements to achieve simultaneous reflection and direction of arrival (DOA) estimation tasks. By utilizing DOA information from the RISS instead of conventional channel estimation, the pilot overhead is reduced and the RISS becomes independent of the hybrid access point (HAP), enabling efficient operation. Specifically, the RISS autonomously estimates the DOA of uplink signals from single-antenna users and reflects them using the HAP's slowly varying DOA information. During downlink transmission, it updates the HAP's DOA information and designs the reflection phase of energy signals based on the latest user DOA information. The paper includes a comprehensive performance analysis, covering system design, protocol details, receiving performance, and RISS deployment suggestions. We derive a closed-form expression to analyze system performance under DOA errors, and calculate the statistical distribution of user received energy using the moment-matching technique. We provide a recommended transmit power to meet a specified outage probability and energy threshold. Numerical results demonstrate that the proposed system outperforms the conventional counterpart by 2.3 dB and 4.7 dB for Rician factors $\kappa_h=\kappa_G=1$ and $\kappa_h=\kappa_G=10$, respectively.
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