A pragmatic channel-adaptive scheduling approach in multiuser MIMO downlink
Date Issued
2005-07-31
Date
2005-07-31
Author(s)
許大山
DOI
932218E002137
Abstract
In the downlink of a multiuser multiple-input,
multiple-output (MIMO) network, one can take advantage of
multiuser diversity by employing channel-adaptive user scheduling.
During a given slot, a base station can dedicate all the
spatial resources to a single user with the best channel condition.
On the other hand, it can distribute them among several
users which together have an advantageous channel condition
combination. We refer to these two approaches as MIMO singlecast
and MIMO multi-cast, respectively. In this paper, we show
that MIMO multi-cast significantly outperforms MIMO singlecast.
Optimal MIMO multi-cast scheduling requires substantial
computation complexity. In light of this, we propose a pragmatic
scheduling approach which offers good performance while greatly
reduces the computation load and the scheduling overhead. Our
simulation results indicate that, given four transmit and receive
antennas, the average capacity achieved by MIMO multi-cast
with the proposed scheduler exceeds that by MIMO single-cast
by 2 and 4 bits per channel use at 0 and 10 dB SNR, respectively.
Publisher
臺北市：國立臺灣大學電信工程學研究所
Type
report
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