TY  - JOUR
T1  - Indoor Visible Light Positioning Technique Based on RIS Position and AOA Estimation
AU  - Lee, Yong Up 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2025
DA  - 2025/1/1
DO  - 10.7840/kics.2025.50.5.751
KW  - 6G
KW  - indoor visible light positioning
KW  - RIS
KW  - angle-of-arrival (AOA)
AB  - In the RIS (reconfigurable intelligent surface) assisted visible light (VL) positioning based on angle-of-arrival (AOA) estimation for 6G communication service, VL positioning channel is largely dependent of RIS position and it is difficult to obtain the exact AOA parameter estimate by conventional technique. In this paper, the new AOA estimation technique based on weighted mean steering vector concept is proposed to estimate the angle-of-arrival (AOA) parameters of multiple clusters under different visible light positioning channel due to RIS position. It is seen that the proposed AOA estimation technique gives an optimal AOA estimate, however the previously published method meets a failure because the widely distributed multipath signals by RIS reflection arrive at the receiver under the positioning environment based on RIS around receiver. The proposed method has also the advantages of the simpler system architecture, the better positioning accuracy, and the lower computation, compared with the conventional one.