公开(公告)号：US11431395B2

公开(公告)日：2022-08-30

申请号：US17083841

申请日：2020-10-29

Applicant: Nokia Technologies Oy

Inventor： Filippo Tosato ,  Marco Maso ,  Mihai Enescu

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/0417

Abstract: A UE determines a PMI, by performing at least the following: determining an intermediate set of vectors from a FD codebook; forming a subset of the intermediate set of vectors; mapping the subset of vectors to a combinatorial indicator; and forming the PMI at least from the combinatorial indicator. The UE sends the PMI toward a wireless network. A base station receives the PMI from the UE. The PMI includes a combinatorial indicator that maps to a subset of vectors from the FD codebook. The base station determines, using at least the received PMI, information from at least the FD codebook to apply to data for transmission toward the UE.

公开(公告)号：US10972170B2

公开(公告)日：2021-04-06

申请号：US16839614

申请日：2020-04-03

Applicant: Nokia Technologies Oy

Inventor： Filippo Tosato ,  Marco Maso ,  Nhat-Quang Nhan

IPC: H04B7/06 ,  H04B7/10 ,  H04B7/0417

Abstract: There is provided a method at a user equipment, comprising:
receiving transmission on two different polarizations over a wireless channel from net-work; determining a plurality of coefficients associated with a precoding matrix based on channel measurements of the reception, wherein the coefficients at least partially define a combination matrix; selecting a coefficient among the coefficients of the weaker polarization, the selected coefficient being a reference coefficient for the weaker polarization; determining a first indicator and a second indicator for the reference coefficient, wherein the first indicator indicates a position of the reference coefficient in the combination matrix and the second indicator comprises an amplitude value associated with the reference coefficient; reporting the first and second indicators to the network.

公开(公告)号：US20200322028A1

公开(公告)日：2020-10-08

申请号：US16839614

申请日：2020-04-03

Applicant: Nokia Technologies Oy

Inventor： Filippo Tosato ,  Marco Maso ,  Nhat-Quang Nhan

IPC: H04B7/06 ,  H04B7/0417 ,  H04B7/10

Abstract: There is provided a method at a user equipment, comprising:receiving transmission on two different polarizations over a wireless channel from net-work; determining a plurality of coefficients associated with a precoding matrix based on channel measurements of the reception, wherein the coefficients at least partially define a combination matrix; selecting a coefficient among the coefficients of the weaker polarization, the selected coefficient being a reference coefficient for the weaker polarization; determining a first indicator and a second indicator for the reference coefficient, wherein the first indicator indicates a position of the reference coefficient in the combination matrix and the second indicator comprises an amplitude value associated with the reference coefficient; reporting the first and second indicators to the network.