Multicell Multicast Beamforming with Delayed SNR Feedback

We evaluate the performance of beamforming in the downlink of a Single Frequency Network (SFN), in which common data is transmitted to all participating users simultaneously. The beamforming is jointly optimized for all cells in the network and for all users. The algorithm is based on spatio-tempora...

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Bibliographic Details
Main Authors: Jordan, M., Xitao Gong, Ascheid, G.
Format: Conference Proceeding
Language:English
Subjects:
Array signal processing
Base stations
Delay
Downlink
Feedback
Multimedia communication
Signal processing algorithms
Streaming media
Transmitters
WiMAX
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Description
Summary:We evaluate the performance of beamforming in the downlink of a Single Frequency Network (SFN), in which common data is transmitted to all participating users simultaneously. The beamforming is jointly optimized for all cells in the network and for all users. The algorithm is based on spatio-temporal correlation knowledge (long term channel state information at the transmitter) and regularly updated, but possibly delayed, SNR information. In a first stage of this algorithm an estimator for the current SNR is built as a function of the beamforming weights. In a second stage of the algorithm, the beamforming weights are optimized in order to maximize the minimum SNR in the system.
ISSN:1930-529X
2576-764X
DOI:10.1109/GLOCOM.2009.5425297