Title :
Multicell Multicast Beamforming with Delayed SNR Feedback
Author :
Jordan, Markus ; Gong, Xitao ; Ascheid, Gerd
Author_Institution :
Inst. for Integrated Signal Process. Syst., RWTH Aachen Univ., Aachen, Germany
Abstract :
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.
Keywords :
array signal processing; cellular radio; multicast communication; radio transmitters; wireless channels; SNR estimator; beamforming weights; delayed SNR feedback; long term channel state information; multicell multicast beamforming; single frequency network; spatio-temporal correlation knowledge; transmitter; Array signal processing; Base stations; Delay; Downlink; Feedback; Multimedia communication; Signal processing algorithms; Streaming media; Transmitters; WiMAX;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425297
