TY - GEN
T1 - Joint optimization of CQI calculation and interference mitigation for user scheduling in MIMO-OFDM systems
AU - Sadek, Mirette
AU - Aïssa, Sonia
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2011/5
Y1 - 2011/5
N2 - In MIMO-OFDM multiuser systems, user scheduling is employed as a means of multiple access. In a downlink scenario, users that share the same subcarriers of an OFDM symbol are separated through precoding in order to achieve space division multiple access (SDMA). User scheduling techniques rely on channel knowledge at the transmitter, namely, the so-called channel quality indicator (CQI). In this paper, we implement a leakage-based precoding algorithm whose purpose is twofold. First, it is used to compute a reliable CQI based on a group of precoding vectors that are adapted to the channel. Then, it implements user scheduling through using the optimum vectors for precoding, thus minimizing interference among users. We also introduce the concept of resource block size adaptivity. The resource block (RB) is defined as the least unit in an OFDM symbol that a user can be assigned to. We propose a variable RB size that adapts to the channel conditions. © 2011 IEEE.
AB - In MIMO-OFDM multiuser systems, user scheduling is employed as a means of multiple access. In a downlink scenario, users that share the same subcarriers of an OFDM symbol are separated through precoding in order to achieve space division multiple access (SDMA). User scheduling techniques rely on channel knowledge at the transmitter, namely, the so-called channel quality indicator (CQI). In this paper, we implement a leakage-based precoding algorithm whose purpose is twofold. First, it is used to compute a reliable CQI based on a group of precoding vectors that are adapted to the channel. Then, it implements user scheduling through using the optimum vectors for precoding, thus minimizing interference among users. We also introduce the concept of resource block size adaptivity. The resource block (RB) is defined as the least unit in an OFDM symbol that a user can be assigned to. We propose a variable RB size that adapts to the channel conditions. © 2011 IEEE.
UR - http://hdl.handle.net/10754/564378
UR - http://ieeexplore.ieee.org/document/5956653/
UR - http://www.scopus.com/inward/record.url?scp=80052019449&partnerID=8YFLogxK
U2 - 10.1109/VETECS.2011.5956653
DO - 10.1109/VETECS.2011.5956653
M3 - Conference contribution
SN - 9781424483310
BT - 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -