Patent ID: 9100068
Filing Date: 2015-08-04
Classification: H04B

Abstract:
1. A method for wireless communications, comprising: exchanging with a device, before each data session, information about resolution levels for beamforming to be used for that data session; receiving training signals transmitted from the device using a first set of transmit directions; deriving, from the first set of transmit directions, a first preferred transmit direction; providing, as feedback to the device, an indication of the first preferred transmit direction to the device; receiving training signals transmitted from the device using a second set of transmit directions, wherein the second set of transmit directions is derived from the first preferred transmit direction if the information indicates support for multiresolution beamforming; deriving, from the second set of transmit directions, a second preferred transmit direction; and providing, as feedback to the device, an indication of the second preferred transmit direction to the device, wherein each transmit direction in the second set has a higher resolution than each transmit direction in the first set.