Design and Characterization of a Full-duplex Multi-antenna System for WiFi networks
Melissa Duarte,Ashutosh Sabharwal,Vaneet Aggarwal,Rittwik Jana,Kadangode K. Ramakrishnan,Christopher W. Rice,Nemmara K. Shankaranarayanan +6 more
TL;DR: In this article, the authors present an experimental and simulation based study to evaluate the use of full-duplex as a mode in practical IEEE 802.11 networks and conclude that there are potentially significant benefits gained from including a fullduplex mode in future WiFi standards.
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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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Citations
Nonlinear self-interference cancellation in MIMO full-duplex transceivers under crosstalk
TL;DR: The signal model utilized by the canceller is capable of modeling the in-phase quadrature (IQ) imbalance, the nonlinearity of the transmitter power amplifier, and the crosstalk between the transmitters, thereby being the most comprehensive signal model presented thus far within the full-duplex literature.
Monostatic Co-Polarized Full-Duplex Antenna With Left- or Right-Hand Circular Polarization
TL;DR: In this paper, a monostatic dual-polarized simultaneous transmit and receive (STAR) antenna system with high isolation is introduced, where a beamforming network (BFN) producing 0°, ±90° and ±180°, and ±270° phase progression is used to feed TX and RX ports of four dual polarized antenna elements arranged in a sequential rotation array (SRA).
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Full-Duplex Versus Half-Duplex Amplify-and-Forward Relaying: Which is More Energy Efficient in 60-GHz Dual-Hop Indoor Wireless Systems?
TL;DR: A counter-intuitive finding is shown that with a relatively loose maximum transmission power constraint, FD relaying with two-stage self-interference cancellation is preferable to both FD relays with one-stageSelf-Interference cancellation and HD relaying, resulting in a higher optimized EE.
92
Online Training of an Opto-Electronic Reservoir Computer Applied to Real-Time Channel Equalization
TL;DR: This work investigates the online learning approach by training an optoelectronic reservoir computer using a simple gradient descent algorithm, programmed on a field-programmable gate array chip, and shows that its system is particularly well suited for realistic channel equalization.
Full-duplex in large-scale wireless systems
Bei Yin,Michael Wu,Christoph Studer,Joseph R. Cavallaro,Jorma Lilleberg +4 more
- 01 Nov 2013
TL;DR: The preliminary results show that large-scale MIMO is able to render full-duplex communication more resilient against inter-user interference and helps to mitigate the effects of residual TX-RF impairments.
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John G. Proakis
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TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
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A simple transmit diversity technique for wireless communications
TL;DR: This paper presents a simple two-branch transmit diversity scheme that provides the same diversity order as maximal-ratio receiver combining (MRRC) with one transmit antenna, and two receive antennas.
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Achieving single channel, full duplex wireless communication
Jung-Il Choi,Mayank Jain,Kannan Srinivasan,Phil Levis,Sachin Katti +4 more
- 20 Sep 2010
TL;DR: In this paper, a single channel full-duplex wireless transceiver is proposed, which uses a combination of RF and baseband techniques to achieve FD with minimal effect on link reliability.
Practical, real-time, full duplex wireless
Mayank Jain,Jung-Il Choi,Taemin Kim,Dinesh Bharadia,Siddharth Seth,Kannan Srinivasan,Philip Levis,Sachin Katti,Prasun Sinha +8 more
- 19 Sep 2011
TL;DR: Experimental results show that a re- design of the wireless network stack to exploit full duplex capability can result in significant improvements in network performance.
Experiment-Driven Characterization of Full-Duplex Wireless Systems
TL;DR: This work shows that the average amount of cancellation increases for active cancellation techniques as the received self-interference power increases, and shows that digital cancellation is more effective when applied selectively based on measured suppression values.