TY - GEN
T1 - A CQI feedback reduction scheme for multi-user MIMO/OFDMA systems
AU - Cho, Myeon Gyun
AU - Kim, Youngju
AU - Lee, Jaekon
AU - Hong, Daesik
PY - 2007
Y1 - 2007
N2 - An opportunistic scheduling is adopted to improve the capacity of the system by exploiting the multiuser diversity of multiuser MIMO (MU-MIMO)systems. However, it requires a large amount of feedback carrying the channel quality information (CQI) of each user to the transmitter. The considered Per User Unitary and Rate Control (PU2RC) needs to feedback the preferred precoding index and its CQIs, and it has a defect in scheduling the streams for the grouped user. In order to overcome these drawbacks, a novel feedback reduction scheme is proposed and is modified for OFDMA systems in this paper. It employs transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling. The simulation results demonstrate that TCP-OFB/OFDMA shows comparable performance to PU2RC while it only requires far reduced feedback load.
AB - An opportunistic scheduling is adopted to improve the capacity of the system by exploiting the multiuser diversity of multiuser MIMO (MU-MIMO)systems. However, it requires a large amount of feedback carrying the channel quality information (CQI) of each user to the transmitter. The considered Per User Unitary and Rate Control (PU2RC) needs to feedback the preferred precoding index and its CQIs, and it has a defect in scheduling the streams for the grouped user. In order to overcome these drawbacks, a novel feedback reduction scheme is proposed and is modified for OFDMA systems in this paper. It employs transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling. The simulation results demonstrate that TCP-OFB/OFDMA shows comparable performance to PU2RC while it only requires far reduced feedback load.
UR - http://www.scopus.com/inward/record.url?scp=44349167114&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44349167114&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2007.4394344
DO - 10.1109/PIMRC.2007.4394344
M3 - Conference contribution
AN - SCOPUS:44349167114
SN - 1424411440
SN - 9781424411443
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
T2 - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
Y2 - 3 September 2007 through 7 September 2007
ER -