Throughput-Efficient Scheduling and Interference Alignment for MIMO Wireless Systems

Ronasi K, Niu B, Wong VW, Gopalakrishnan S, Schober R (2014)

Publication Language: English

Publication Type: Journal article

Publication year: 2014

Journal

IEEE Transactions on Wireless Communications Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 13

Pages Range: 1779 - 1789

Journal Issue: 4

DOI: 10.1109/TWC.2014.031314.122040

Abstract

Multiple-input multiple-output (MIMO) wireless communication systems can achieve higher throughput through interference alignment. For a small number of users, determining the maximum possible degrees of freedom as well as the feasibility of interference alignment in MIMO systems is well studied. However, the issues of scheduling in systems employing interference alignment and serving a large number of users have received little attention so far. In this paper, we study the problem of joint scheduling, interference alignment, and packet admission control in MIMO wireless systems with the goal of maximizing system throughput subject to stability constraints. We formulate a stochastic network optimization problem and propose a scheduling and interference alignment (SIA) algorithm. In each time slot, SIA schedules some users among many competing ones to transmit data, and determines encoding and decoding matrices for the selected users. Packet admission control is performed in each time slot. In addition, we propose a heuristic semi-distributed algorithm (SDSIA), which has a lower computational complexity than the SIA algorithm. Via simulation, we evaluate the performance of SIA and SDSIA for different algorithm parameters and different numbers of users. We also compare the performance of SDSIA with other approaches which do not simultaneously exploit interference alignment and scheduling and find that the combination of these two techniques increases the achievable data rate dramatically.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

University of British Columbia CA Canada (CA)

How to cite

APA:

Ronasi, K., Niu, B., Wong, V.W., Gopalakrishnan, S., & Schober, R. (2014). Throughput-Efficient Scheduling and Interference Alignment for MIMO Wireless Systems. IEEE Transactions on Wireless Communications, 13(4), 1779 - 1789. https://doi.org/10.1109/TWC.2014.031314.122040

MLA:

Ronasi, Keivan, et al. "Throughput-Efficient Scheduling and Interference Alignment for MIMO Wireless Systems." IEEE Transactions on Wireless Communications 13.4 (2014): 1779 - 1789.

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