Method of transmit beamforming for multicasting in a wireless communication system
AssigneeAlcatel-Lucent USA Inc.
InventorANGEL LOZANO
Life of this patent
Estimating the term…
Abstract
The present invention provides a method of determining a plurality of beamforming weights for application to multicast transmission to a plurality of users by a corresponding plurality of antennas associated with a base station. One embodiment of the method includes determining a covariance matrix associated with the plurality of users. The covariance matrix is determined based on a channel matrix and a noise-plus-interference vector associated with each user. The method also includes determining the plurality of beamforming weights based on a gradient of the covariance matrix associated with a selected one of the plurality of users and storing the plurality of beamforming weights.
Claims9
A method of determining a plurality of beamforming weights for application to multicast transmission to a plurality of users by a corresponding plurality of antennas associated with a base station, comprising:
- determining a covariance matrix associated with the plurality of users, said covariance matrix being a function of a channel matrix and a noise-plus-interference vector associated with at least a portion of the plurality of users;
- determining the plurality of beamforming weights based on a gradient of the covariance matrix associated with a selected one of the plurality of users;
- and
- transmitting at least one multicast signal from the plurality of antennas using the determined beamforming weights associated with the plurality of antennas.
Dependencies are inferred from the claim text.