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

Claim 1:
2. The method of claim 1, 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 Ω1, Ω2 are solid angles of departure (AoD) of beams transmitted from the multi-antenna transmitter and the RIS, Ω1 and Ω2 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 demoted by ρ1 and ρr respectively, and dMt, dM, dMH, and dMrH and denotes various directivity vectors defining distances between the discrete elements of ti UPA of the RIS.