Reference signal design and signaling for per-user elevation MIMO

摘要

A method to use RSs for per-user elevation beamforming is described. An eNB sends, to a UE, an indication of which RSs in a plurality of RSs sound in the elevation dimension and which RSs in the plurality of RSs sound in the azimuthal dimension. Then, the eNB sends, to the UE, the plurality of RSs using a plurality of antenna. The UE separates the plurality of RSs into the first portion and the second portion based at least in part on the indication and sends elevation and azimuthal feedback based on the received RSs to the eNB. The eNB determines beamforming weights for the plurality of antenna based at least in part on the elevation feedback and the azimuthal feedback. Apparatus and computer readable media are also described.

主权项

1. A method comprising:
receiving an indication of which reference signals in a plurality of reference signals sound in the elevation dimension and which reference signals in the plurality of reference signals sound in the azimuthal dimension; receiving the plurality of reference signals from a transmit antenna array; separating the plurality of reference signals into a first portion and a second portion based at least in part on the indication; calculating elevation feedback and azimuth feedback based on the first and second portions; and sending the elevation feedback and the azimuthal feedback to the access point.