Robust Multicast Beamforming Using Covariance Channel State Information

The problem of transmit beamforming design for multicast wireless system is considered in this paper. The authors focus on the robust long-term transmit beamforming design with only imperfect knowledge of the channel covariance from two view points: minimizing total transmission power with prescribed Signal-to-Noise Ratio (SNR) constraints at the receivers and maximizing the minimum SNR to achieve the relative max-min fairness. Only infrequent feedback is required from the users in such an algorithm. Furthermore, the algorithm shows great tolerance of imperfect Channel State Information (CSI) on both transceiver sides.

Provided by: Institute of Electrical & Electronic Engineers Topic: Networking Date Added: Aug 2012 Format: PDF

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