Patent ID: 11909479
Assignee: NEC CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The system of claim 15, wherein channel matrices of each discrete element of the UPA of the RIS are given as:

Ht=dMt{Ωt}ρtdMH{Ω1}, and

Hr=dM{Ω2}ρrdMrH{Ωr},

where Ωr and Ω2 fat are solid angles of departure (AoD) of beams transmitted from the multi-antenna transmitter and the RIS, Ω1 and Ωr are solid angles of arrival (AoA) of the beams received at the RIS and the multi-antenna receiver, respectively, a gain of the line-of-sight (LoS) paths from the transmitter to the RIS and from the RIS to the receiver are denoted by ρt and ρr, respectively, and dMt, dM, dMH, and dMrH denotes various directivity vectors defining distances between the discrete elements of the UPA of the RIS.