TY - GEN
T1 - A low complexity linear multiuser MIMO beamforming system with limited feedback
AU - Chae, Chan Byoung
AU - Mazzarese, David
AU - Jindal, Nihar
AU - Heath, Robert W.
PY - 2008/9/22
Y1 - 2008/9/22
N2 - In this paper, we propose a low complexity linear multiuser beamforming system for the multiple-input multipleoutput (MIMO) broadcast channel. We consider the specific case of transmission of a single information stream to two users with two or more receive antennas. Unlike past work in which an iterative algorithm is required to design the beamformers, we first provide a low complexity non-iterative solution via the generalized eigenvector decomposition to jointly optimize transmit beamforming and receive combining vectors. The proposed beamforming technique works for two or more transmit and receive antennas where perfect channel state information is available at the transmitter. To enable practical implementation, a new non-uniform limited feedback algorithm is also proposed that exploits the structure of the algorithm to avoid full channel quantization especially for two transmit antenna systems. The feedback overhead is independent of the number of receive antennas. Simulation results show that the proposed method performs close to the sum capacity of the MIMO broadcast channel even with limited feedback.
AB - In this paper, we propose a low complexity linear multiuser beamforming system for the multiple-input multipleoutput (MIMO) broadcast channel. We consider the specific case of transmission of a single information stream to two users with two or more receive antennas. Unlike past work in which an iterative algorithm is required to design the beamformers, we first provide a low complexity non-iterative solution via the generalized eigenvector decomposition to jointly optimize transmit beamforming and receive combining vectors. The proposed beamforming technique works for two or more transmit and receive antennas where perfect channel state information is available at the transmitter. To enable practical implementation, a new non-uniform limited feedback algorithm is also proposed that exploits the structure of the algorithm to avoid full channel quantization especially for two transmit antenna systems. The feedback overhead is independent of the number of receive antennas. Simulation results show that the proposed method performs close to the sum capacity of the MIMO broadcast channel even with limited feedback.
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U2 - 10.1109/CISS.2008.4558563
DO - 10.1109/CISS.2008.4558563
M3 - Conference contribution
AN - SCOPUS:51849084424
SN - 9781424422470
T3 - CISS 2008, The 42nd Annual Conference on Information Sciences and Systems
SP - 418
EP - 422
BT - CISS 2008, The 42nd Annual Conference on Information Sciences and Systems
T2 - CISS 2008, 42nd Annual Conference on Information Sciences and Systems
Y2 - 19 March 2008 through 21 March 2008
ER -