TY - GEN
T1 - MU-MIMO with channel Statistics-based codebooks in spatially correlated channels
AU - Clerckx, Bruno
AU - Kim, Gil
AU - Kim, Sungjin
PY - 2008
Y1 - 2008
N2 - We investigate the performance of limited feedback Zero Forcing Beamforming-based MU-MIMO in correlated channels when users have the opportunity to adapt their codebooks as a function of their own channel statistics (CDIT). An upper bound on the rate loss is derived in terms of the amount of feedback and the statistics of the channel. In order to maintain a constant rate loss with respect to the perfect CSIT case, it is shown that the number of feedback bits should scale linearly with the SNR (in dB) with a slope proportional to the rank of the user transmit correlation matrix and logarithmically with the ratio of the second to the first largest eigenvalue of the transmit correlation matrix. Simulation results confirm analytical derivations and suggest that a channel statistics-based codebook is a reasonable simple approach to boost the throughput in correlated channels while incurring only a small overhead.
AB - We investigate the performance of limited feedback Zero Forcing Beamforming-based MU-MIMO in correlated channels when users have the opportunity to adapt their codebooks as a function of their own channel statistics (CDIT). An upper bound on the rate loss is derived in terms of the amount of feedback and the statistics of the channel. In order to maintain a constant rate loss with respect to the perfect CSIT case, it is shown that the number of feedback bits should scale linearly with the SNR (in dB) with a slope proportional to the rank of the user transmit correlation matrix and logarithmically with the ratio of the second to the first largest eigenvalue of the transmit correlation matrix. Simulation results confirm analytical derivations and suggest that a channel statistics-based codebook is a reasonable simple approach to boost the throughput in correlated channels while incurring only a small overhead.
UR - https://www.scopus.com/pages/publications/67249100357
UR - https://www.scopus.com/pages/publications/67249100357#tab=citedBy
U2 - 10.1109/GLOCOM.2008.ECP.189
DO - 10.1109/GLOCOM.2008.ECP.189
M3 - Conference contribution
AN - SCOPUS:67249100357
SN - 9781424423248
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 956
EP - 960
BT - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
T2 - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
Y2 - 30 November 2008 through 4 December 2008
ER -