Patent ID: 8886139
Filing Date: 2014-11-11
Classification: H04B

Abstract:
1. A method for beamforming in a communication system, the method comprising: transmitting, with a first station, a first plurality of training data units via a first plurality of antennas to a second station having a second plurality of antennas, wherein applying, at the first station, a different transmit steering vector as each training data unit in the first plurality of training data units is transmitted; after transmitting the first plurality of training data units, receiving, at the first station, a second plurality of training data units via the first plurality of antennas, the second plurality of training data units having been transmitted by the second station while the second station applies a different transmit steering vector to the second plurality of antennas as each training unit in the second plurality of training data units is transmitted, wherein the second plurality of training data units includes an information element that specifies a feedback from the second station, the feedback including one identifier corresponding to one of the training data units in the first plurality of data units; applying, at the first station, a single receive antenna configuration as all of the training data units in the second plurality of training data units are received; generating, at the first station, a first plurality of quality indicators based on the second plurality of received training data units, wherein each of the first plurality of quality indicators corresponds to a respective one of the second plurality of training data units; selecting, at the first station, one or more training data units from the second plurality of training data units based on the first plurality of quality indicators; and transmitting, from the first station to the second station, a feedback message including (i) one or more indicators of the one or more training data units selected from the second plurality of training data units, and (ii) a request to perform a subsequent beamforming training procedure to select a receive steering vector.