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arXiv · 1210.1639

Design and Characterization of a Full-duplex Multi-antenna System for WiFi networks

Melissa Duarte·Ashutosh Sabharwal·Vaneet Aggarwal·Rittwik Jana·K. K. Ramakrishnan·Christopher Rice·N. K. Shankaranarayanan
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Abstract

In this paper, we present an experimental and simulation based study to evaluate the use of full-duplex as a mode in practical IEEE 802.11 networks. To enable the study, we designed a 20 MHz multi-antenna OFDM full-duplex physical layer and a full-duplex capable 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 multi-antenna half-duplex 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 multi-node single-AP networks. The two combined results allow us to conclude that there are potentially significant benefits gained from including a full-duplex mode in future WiFi standards.

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Melissa Duarte, Ashutosh Sabharwal, Vaneet Aggarwal, Rittwik Jana, K. K. Ramakrishnan, Christopher Rice, N. K. Shankaranarayanan. 2012-10-08. Design and Characterization of a Full-duplex Multi-antenna System for WiFi networks. https://doi.org/10.1109/tvt.2013.2284712

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