Available internal projects
Performance Analysis of MU-MIMO with Very Large Antenna Arrays Over Nakagami-m Fading Channels
Multiuser MIMO (MU-MIMO), where the base stations (BSs) are equipped
with multiple antennas and communicate with several co-channel users,
has gained much attention and is now being introduced in several new
generation wireless standards (e.g., LTE-Advanced, 802.16m).
Conventional MIMO technology uses a relatively small number of
antennas at the BS. The LTE standard, for example, allows for up to 8
antenna ports. By contrast, we are concerned with MIMO systems that
use a very large number of antennas at the BS compared to systems
being built today, i.e., a hundred or more antennas. Recently, MU-MIMO
with very large antenna arrays at the BS is of particular interest
since it i) significantly improves the data rate, and communication
reliability [1, 2]; and ii) reduces the transmit power of an order of
magnitude, or more .
Most of the previous studies assume that the channels are Rayleigh
fading. However, it is better to model the channel as the Nakagami-m
fading since Nakagami-m channels capture a variety of physical
environments (including Rayleigh fading models). Furthermore,
Nakagami-m model has been shown to fit better with empirical
data. Therefore, it is necessary to investigate the performance of
very large MU-MIMO under Nakagami-m fading channels.
In this project, we will study the performance of MU-MIMO with very
large antenna arrays over Nakagami-m channels. We consider the uplink
and assume that the BS uses maximum-ratio combining techniques to
detect the transmit signals from the users. We use measures such as
sum-rate, symbol error probability, outage probability, etc, to
analyze the system performance and the effect of the fading parameter
on the power efficiency, required number of antennas, etc.
The student needs a strong background in mathematics (especially
analytics, algebra), probability theory, and good skills in Matlab
F. Rusek, D. Persson, B. K. Lau, E. G. Larsson, T. L. Marzetta,
O. Edfors, and F. Tufvesson, Scaling up MIMO:Opportunities and
challenges with very large arrays, IEEE Signal Process. Mag., to
appear. [Online]. Available://arxiv.org/abs/1201.3210.
T. L. Marzetta, Noncooperative cellular wireless with unlimited
numbers of base station antennas, IEEE Trans. Wireless Commun.,
vol. 9, no. 11, pp. 3590-3600, Nov. 2010.
H. Q. Ngo, E. G. Larsson, and T. L. Marzetta, Energy and spectral
ef_ciency of very large multiuser MIMO systems, IEEE
Trans. Commun., submitted. [Online]. Available:
Last updated: 2014 09 22 16:58