TY - GEN
T1 - A random beamforming technique in multiuser multi-antenna OFDM systems for large system capacity and fairness among users
AU - Eriguchi, Yoshitaka
AU - Ohtsuki, Tomoaki
PY - 2008/12/1
Y1 - 2008/12/1
N2 - We propose a random beamforming technique in multiuser multi-antenna orthogonal frequency division multiplexing (OFDM) systems for a large system capacity and fairness among users. In the proposed technique, we allocate several beams on each subcarrier to users based on signal-to-interference plus noise ratio (SINR) and all the remaining beams on each subcarrier by the proportional fairness (PF) algorithm. We also use the random unitary matrices corresponding to the beams and subcarriers where each user with low capacity has its highest SINR in the next time slot. We show that compared to the conventional techniques, such as the SINR-based scheduling scheme and the PF scheduling scheme, the proposed technique achieves high system capacity with about the same variance of user capacity.
AB - We propose a random beamforming technique in multiuser multi-antenna orthogonal frequency division multiplexing (OFDM) systems for a large system capacity and fairness among users. In the proposed technique, we allocate several beams on each subcarrier to users based on signal-to-interference plus noise ratio (SINR) and all the remaining beams on each subcarrier by the proportional fairness (PF) algorithm. We also use the random unitary matrices corresponding to the beams and subcarriers where each user with low capacity has its highest SINR in the next time slot. We show that compared to the conventional techniques, such as the SINR-based scheduling scheme and the PF scheduling scheme, the proposed technique achieves high system capacity with about the same variance of user capacity.
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U2 - 10.1109/VETECF.2008.102
DO - 10.1109/VETECF.2008.102
M3 - Conference contribution
AN - SCOPUS:58149120696
SN - 9781424417223
T3 - IEEE Vehicular Technology Conference
BT - The 68th IEEE Vehicular Technology Conference, VTC 2008-Fall
T2 - 68th Semi-Annual IEEE Vehicular Technology, VTC 2008-Fall, Conference
Y2 - 21 September 2008 through 24 September 2008
ER -