Design and Characterization of a Full-Duplex Multiantenna System for WiFi Networks

In this paper, we present an experiment- and simulation-based study to evaluate the use of full duplex (FD) as a potential mode in practical IEEE 802.11 networks. To enable the study, we designed a 20-MHz multiantenna orthogonal frequency-division-multiplexing (OFDM) FD physical layer and an FD medi...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2014-03, Vol.63 (3), p.1160-1177
Main Authors: Duarte, Melissa, Sabharwal, Ashutosh, Aggarwal, Vaneet, Jana, Rittwik, Ramakrishnan, K. K., Rice, Christopher W., Shankaranarayanan, N. K.
Format: Article
Language:English
Subjects:
Access control
Access methods and protocols, osi model
Antennas
Applied sciences
Business and industry local networks
Compatibility
Design engineering
Exact sciences and technology
Full-duplex
Gain
IEEE 802.11 Standards
Information, signal and communications theory
media access control (MAC)
Multiplexing
Networks
Networks and services in france and abroad
orthogonal frequency-division multiplexing (OFDM)
Radio frequency
Radiocommunications
Receiving antennas
Signal and communications theory
Simulation
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Throughput
Transmitting antennas
WiFi
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Summary:In this paper, we present an experiment- and simulation-based study to evaluate the use of full duplex (FD) as a potential mode in practical IEEE 802.11 networks. To enable the study, we designed a 20-MHz multiantenna orthogonal frequency-division-multiplexing (OFDM) FD physical layer and an FD media access control (MAC) protocol, which is backward compatible with current 802.11. Our extensive over-the-air experiments, simulations, and analysis demonstrate the following two results. First, the use of multiple antennas at the physical layer leads to a higher ergodic throughput than its hardware-equivalent multiantenna half-duplex (HD) counterparts for SNRs above the median SNR encountered in practical WiFi deployments. Second, the proposed MAC translates the physical layer rate gain into near doubling of throughput for multinode single-AP networks. The two results allow us to conclude that there are potentially significant benefits gained from including an FD mode in future WiFi standards.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2013.2284712