TY - GEN
T1 - Correlated fading in broadcast MIMO channels
T2 - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
AU - Clerckx, Bruno
AU - Kim, Gil
AU - Kim, Sungjin
PY - 2008
Y1 - 2008
N2 - The impact of transmit correlation on the performance of limited feedback Multi-User MIMO is investigated. Correlated fading is shown to highly influence the probability of scheduling orthogonal users and the ability to achieve small quantization errors. Correlated fading is indeed beneficial to MU- MIMO performance as it can potentially reduce the quantization error, if an appropriate codebook is used. Grassmanian Line Packing is very much inappropriate for MU-MIMO in correlated fading environments, while DFT-based codebooks and channel statistics-based codebooks are promising candidates. Additionally correlated fading is very beneficial to the scheduler. User correlation is shown to decrease more quickly in transmit correlated channels than in i.i.d. channels as the number of active users increases. However, correlated fading is also shown to be detrimental to the scheduler performance when the number of active users is rather small and cell sectorization is performed.
AB - The impact of transmit correlation on the performance of limited feedback Multi-User MIMO is investigated. Correlated fading is shown to highly influence the probability of scheduling orthogonal users and the ability to achieve small quantization errors. Correlated fading is indeed beneficial to MU- MIMO performance as it can potentially reduce the quantization error, if an appropriate codebook is used. Grassmanian Line Packing is very much inappropriate for MU-MIMO in correlated fading environments, while DFT-based codebooks and channel statistics-based codebooks are promising candidates. Additionally correlated fading is very beneficial to the scheduler. User correlation is shown to decrease more quickly in transmit correlated channels than in i.i.d. channels as the number of active users increases. However, correlated fading is also shown to be detrimental to the scheduler performance when the number of active users is rather small and cell sectorization is performed.
UR - http://www.scopus.com/inward/record.url?scp=67249139085&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2008.ECP.735
DO - 10.1109/GLOCOM.2008.ECP.735
M3 - Conference contribution
AN - SCOPUS:67249139085
SN - 9781424423248
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 3830
EP - 3834
BT - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
Y2 - 30 November 2008 through 4 December 2008
ER -