Patent ID: 9712215
Date: 2017-07-18
CPC Classifications: H04B,H04L

Claim:
1. A method of beamforming training for transmit beamforming from a second communication device to a first communication device, the method comprising: determining, in the first communication device, a channel estimate of a communication channel, the communication channel being from the second communication device to the first communication device; calculating, at the first communication device and based on the channel estimate, a diagonal beamforming matrix for use by the second communication device when transmitting to the first communication device, wherein the diagonal beamforming matrix is calculated in accordance with a type of an equalizer that will later be used by the first communication device when subsequently receiving one or more beamformed signals from the second communication device; transmitting, with the first communication device, a plurality of diagonal elements of the diagonal beamforming matrix to the second communication device; after transmitting the plurality of diagonal elements of the diagonal beamforming matrix, receiving, at the first communication device, at least one signal from the second communication device, the at least one signal having been beamformed, by the second communication device, based on the beamforming matrix calculated, by the first communication device, in accordance with the type of the equalizer; and equalizing, at the first communication device, the received at least one signal using the equalizer.