# US 2021/0242911 A1 · System and Method for Two-way Relaying with Beamforming

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- Number: US 2021/0242911 A1
- Document ID: US20210242911A1
- Status: Published application
- Kind: A1
- Application number: 17/201,867
- Filed: 2021-03-15
- Published: 2021-08-05
- Earliest claimed: 2011-04-15
- Assignees: Futurewei Technologies, Inc.
- Applicants: FutureWei Technologies, Inc.
- Inventors: Ali Yazdan Panah; Philippe Sartori
- Web page: https://patentgrep.com/patent/US20210242911A1

## CPC

- H04B 7/0417: Feedback systems
- H04B 7/155: Ground-based stations (H04B7/204 takes precedence)
- H04B 7/0465: {taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account}
- H04B: TRANSMISSION

## Abstract

A system and method for two-way relaying with beamforming are provided. A method for relay operations includes estimating communications channels between a relay and communications devices coupled to the relay, storing data contained in the transmissions, storing data contained in the transmissions, precoding a transmission including a subset of the stored data with a precoding matrix, and transmitting the precoded transmission. The estimating is based on transmissions made by the communications devices in the subset of communications devices, and the precoding matrix is based on estimates of the communications channels.

## Claims

### Claim 1

A method comprising:
transmitting, by a relay, transmission parameters to a subset of communications devices coupled to the relay;
receiving, by the relay, precoding vectors from communications devices in the subset of communications devices;
determining, by the relay, a precoding matrix from the precoding vectors;
providing, by the relay, the precoding matrix to communications devices coupled to the relay;
storing, by the relay, a portion of transmissions from the subset of communications devices; and
transmitting, by the relay, a transmission comprising a combination of at least a subset of the stored portion of the transmissions, wherein the transmission is precoded with the precoding matrix.