Patent ID: 11967829
Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The channel estimating apparatus according to claim 4, wherein the reflecting surface channel updating unit updates the reflecting surface channel by Equation 3, on the basis of the fixed transmitting channel and the fixed phase variable,

hk((βk°MG)H{tilde over (R)}k−1(βk°MG))−1(βk°MG)H{tilde over (R)}k−1(rk°ejøk),∀k  [Equation 3]

where βk is a channel correlation coefficient determined by a velocity of the k-th terminal during the L previous time slots,
rk is the received signal strength (RSS) fed back from the k-th terminal during the L previous time slots,
° is a hadamard product symbol, and
{tilde over (R)}k 
is an approximated covariance matrix acquired by approximating a covariance matrix Rk which is a covariance matrix for a Gaussian noise vector between the transmitter and the k-th terminal during the L previous time slots.