IEEE International Communications Conference,
May 20-24, 2018, Kansas City, MO, USA.
User Scheduling for Millimeter Wave MIMO Communications with Low-Resolution ADCs
Jinseok Choi and
Brian L. Evans
Department of Electrical
and Computer Engineering,
Wireless Networking and Communications Group,
The University of Texas at Austin,
Austin, TX 78712 USA
Multiantenna Communications Project
To reduce power consumption in the receiver, low-resolution analog-to-digital
converters (ADCs) can be a potential solution for millimeter wave (mmWave)
systems in which many antennas are likely to be deployed to compensate for the
large path loss.
In this paper, we investigate uplink user scheduling when a basestation employs
low-resolution ADCs with a large number of antennas.
Due to quantization error, we show that the channel structure in the beamspace,
in addition to the channel magnitude and beamspace orthogonality, plays a key
role in maximizing the achievable rates of scheduled users.
With the constraint of the equal channel norm, we derive the scheduling criteria
that maximize the uplink sum rate for multi-user multiple input multiple
output (MIMO) systems with a zero-forcing receiver.
Leveraging the derived criteria, we propose an efficient scheduling algorithm
for mmWave systems with low-resolution ADCs.
Numerical results validate that the proposed algorithm outperforms conventional
user scheduling methods in terms of the sum rate.
Questions & Answers
Q. Is a scheduler in the transmitter side?
A. The basestation schedules users since it is uplink communication.
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Last Updated 05/23/18.