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

By Marco F. Duarte, Ashutosh Sabharwal, Vaneet Aggarwal, R. Jana, K. K. Ramakrishnan, C. W. Rice, N. K. Shankaranarayanan. IEEE Transactions on Vehicular Technology, 2012

542 citations recorded by the source corpus.

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.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/acfff2250f14ae9fa21cd17ddf44579c978f994a

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Citations in the corpus

Passive Self-Interference Suppression for Full-Duplex Infrastructure Nodes (2013, methodology): “In [8], [11] heuristic strategies for laptop antenna placement are studied including “device-induced path loss,” in which transmit and receive antennas are shielded by laptop hardware such as the screen.”
In-Band Full-Duplex Relaying: A Survey, Research Issues and Challenges (2015, background): “The non-adaptive ones [7], [8], [73] are unaware of the changes in environment and use fixed parameters (e.”
Dual-Polarized, Differential Fed Microstrip Patch Antennas With Very High Interport Isolation for Full-Duplex Communication (2017, background): “13, this antenna with high interport isolation is more vulnerable to environmental reflections as was also reported in [9] and [20].”
A Survey of In-Band Full-Duplex Transmission: From the Perspective of PHY and MAC Layers (2015, methodology): “Unlike for IBFD transmission with shared antenna, each node divides the antennas into groups for simultaneous transmission and reception and allocates the divided spatial resources into two parts for IBFD transmission [30], [33], [39], [41]–[44].”
Widely Linear Digital Self-Interference Cancellation in Direct-Conversion Full-Duplex Transceiver (2014, background): “To suppress such SI inside the transceiver, various antenna-based solutions [2], [4], [12], [13], active analog/RF cancellation methods [2]– [4], [8], [14]–[16] and digital baseband cancellation techniques [3], [14], [17], [18] have been proposed in the literature.”
All-Digital Self-Interference Cancellation Technique for Full-Duplex Systems (2014, unknown): “Recently, several publications [1]–[16] have considered”
In-Band Full-Duplex Wireless: Challenges and Opportunities (2013, methodology): “A second round of bidirectional IBFD experiments [24], [27], [28], [85], however, demonstrated improved self-interference suppression, to levels sufﬁcient for WiFi networks.”