US 10,659,114 B2 · Multi-layered precoding

Abstract

Apparatuses, methods, and systems for precoding multi-carrier signals are disclosed. One method includes obtaining a transmission channel matrix between a terminal and a plurality of separate users, wherein the transmission channel matrix includes channel estimates for a plurality of subcarriers of the multi-carrier signal, wherein the terminal is one of a plurality of terminals interfaced with a central processing unit, and wherein the terminal communicates with the plurality of spatially separate user with the multi-carrier signals. The method further comprises determining a precoding for the terminal based on a distribution of user signal power across the transmission channel between the terminal and the plurality of spatially separate user, and determining a precoding for the central processing unit based on the precoding for the terminal and based on the transmission channel matrix, wherein a precoding matrix for the central processing unit is multi-carrier signal dependent.

Claims20

Dependent claims

A method of precoding multi-carrier signals, comprising:

obtaining a transmission channel matrix of a transmission channel between a plurality of antennas of a terminal and a plurality of spatially separate users, wherein the transmission channel matrix includes channel estimates for a plurality of subcarriers of the multi-carrier signals;
wherein the terminal is one of a plurality of terminals interfaced with a central processing unit;
wherein the terminal communicates with the plurality of spatially separate user with the multi-carrier signals;
determining a precoding for the terminal based on a distribution of user signal power across the transmission channel between the terminal and the plurality of spatially separate users;
and
determining a precoding for the central processing unit based on the precoding for the terminal and based on the transmission channel matrix, wherein a precoding matrix for the central processing unit is multi-carrier signal dependent.

3 more elements

A system for precoding multi-carrier signals, comprising:

a central processing unit operative to:
obtain a transmission channel matrix between a plurality of antennas of a terminal and a plurality of spatially separate users, wherein the transmission channel matrix includes channel estimates for a plurality of subcarriers, wherein the terminal is one of a plurality of terminals interfaced with a central processing unit, wherein the terminal communicates with the plurality of spatially separate users with multi-carrier wireless signals;
determine a precoding for the terminal based on a distribution of user signal power across the transmission channel between the terminal and the plurality of spatially separate users;
and
determine a precoding for the central processing unit based on the precoding for the terminal and based on the transmission channel matrix, wherein a precoding matrix for the central processing unit is multi-carrier signal dependent;
communicate the precoding for the terminal to the terminal;
apply the precoding matrix of the central processing unit to multi-carrier signals communicated between the central processing unit and the terminal;
wherein the terminal is operative to apply the precoding of the terminal to multi-carrier signals communicated between the terminal and the plurality of spatially separate users.

5 more elements

Dependencies are inferred from the claim text.

Multi-layered precoding

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Multi-layered precoding

Life of this patent

Abstract

Claims20