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

IEEE Transactions on Vehicular Technology - October 2012 (submitted)

Authors: Melissa Duarte, Ashutosh Sabharwal, Vaneet Aggarwal, Rittwik Jana, K. K. Ramakrishnan, Christopher Rice and N. K. Shankaranayanan

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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.


  title={Design and Characterization of a Full-duplex Multi-antenna System for WiFi networks},
  author={Duarte, M. and Sabharwal, A. and Aggarwal, V. and Jana, R. and Ramakrishnan, K. and Rice, C. and Shankaranayanan, N.},
  journal={submitted to IEEE Transactions on Vehicular Technology},
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