| 摘要 |
<p>Certain aspects of the present disclosure relate to methods for beamforming that achieve beamforming optimality criterions. Some proposed beamforming techniques are based on antenna directions with multiple resolutions. The methods comprise: receiving training signals transmitted from a device using a first set of transmit directions; deriving, from the first set of transmit directions, a preferred transmit direction; and providing, as feedback to the device, an indication of the preferred transmit direction to the device, wherein the feedback is provided by sweeping through a second set of transmit directions.The transmit directions are sectors. A sector is an antenna pattern covering a region of space, and a beam is an antenna pattern covering a region in space smaller than the region covered by the sector.</p> |
