TY - GEN
T1 - Opportunistic beamforming with precoding for spatially correlated channels
AU - Al-Naffouri, Tareq Y.
AU - El-Tayeb, Mohamed E.
PY - 2009
Y1 - 2009
N2 - Random beamforming (RBF) exploits multiuser diversity to increase the sum-rate capacity of MIMO broadcast channels. However, in the presence of spatial correlation between the downlink channels, multiuser diversity can not be exploited and the sum-rate suffers a signal to noise (SNR) hit. In this paper, we explore precoding techniques that minimize this hit. Basically, we derive an optimum and an approximate precoding matrix that minimizes the sum-rate hit of RBF. As a by product, we introduce a technique that evaluates the cumulative distribution function (CDF) of weighted norms of Gaussian random variables.
AB - Random beamforming (RBF) exploits multiuser diversity to increase the sum-rate capacity of MIMO broadcast channels. However, in the presence of spatial correlation between the downlink channels, multiuser diversity can not be exploited and the sum-rate suffers a signal to noise (SNR) hit. In this paper, we explore precoding techniques that minimize this hit. Basically, we derive an optimum and an approximate precoding matrix that minimizes the sum-rate hit of RBF. As a by product, we introduce a technique that evaluates the cumulative distribution function (CDF) of weighted norms of Gaussian random variables.
UR - https://www.scopus.com/pages/publications/70349932710
U2 - 10.1109/CWIT.2009.5069522
DO - 10.1109/CWIT.2009.5069522
M3 - Conference contribution
AN - SCOPUS:70349932710
SN - 9781424434015
T3 - 2009 11th Canadian Workshop on Information Theory, CWIT 2009
SP - 63
EP - 66
BT - 2009 11th Canadian Workshop on Information Theory, CWIT 2009
ER -