电子学报2025，Vol.53Issue(9)：3173-3191,19.DOI:10.12263/DZXB.20250195
基于位置感知的RIS辅助叠加导频传输
Location Sensing Empowered Superimposed Pilot Transmission Assisted by Reconfigurable Intelligent Surface
摘要
Abstract
Reconfigurable intelligent surface(RIS)technique has great potential in improving positioning accuracy and data transmission rate.This paper investigated RIS-assisted location sensing and superimposed pilot(SP)transmission under the assumption that position information of mobile user equipment(UE)and channel state information(CSI)are un-available.In this work,a frame structure of transmission protocol composed of several location coherence intervals was de-signed,each with pure-pilot and data-pilot transmission durations.The former was used to estimate UE locations,while the latter was used to transmit data and pilot signals simultaneously.Then,the Cramér-Rao Bound of positional parameter esti-mation error was derived,and the inverse fast Fourier transform(IFFT)algorithm was adopted to obtain the estimation re-sults of UE positions,which were then exploited for channel estimation.Besides,the achievable rate in closed form for SP transmission was calculated,and on this basis,a block coordinate descent algorithm was proposed to jointly optimize the transmit power of UEs and the phase shifts of RIS,aiming to maximize the weighted sum rate of all UEs.The convergence and complexity of algorithms were also analyzed.Finally,simulation results validate the performance of UE position estima-tion algorithm and the superiority of the proposed SP scheme by comparison with the regular pilot scheme.关键词
通信感知一体化/可重构智能表面/叠加导频/位置感知/信道估计Key words
integrated sensing and communication/reconfigurable intelligent surface/superimposed pilot/location sensing/channel estimation分类
信息技术与安全科学引用本文复制引用
赵贲,夏文超,赵海涛,倪艺洋,朱洪波..基于位置感知的RIS辅助叠加导频传输[J].电子学报,2025,53(9):3173-3191,19.基金项目
国家重点研发计划(No.2023YFB3811505) （No.2023YFB3811505）
国家自然科学基金(No.92367302,No.62201285) （No.92367302,No.62201285）
2025年江苏省研究生科研创新计划(No.KYCX25_1113) National Key Research and Development Program of China(No.2023YFB3811505) （No.KYCX25_1113）
National Natural Science Foundation of China(No.92367302,No.62201285) （No.92367302,No.62201285）
Postgraduate Research Program of Jiangsu Province in 2025(No.KYCX25_1113) （No.KYCX25_1113）
