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
Capacity gain and design trade-offs for partial-duplex OFDM wireless communications
TL;DR: This paper analyzes the regions of self-interference cancelation values where partial-duplex systems outperform half-du Plex ones in terms of achievable spectral efficiency and investigates the potential of the proposed hybrid method.
Full-duplex radio with two receivers for self-interference cancellation
TL;DR: Since the self-interference at baseband is removed by the differential amplifier instead of a complex digital signal processing unit, it makes the proposed system suitable for broad-band millimetre-wave full-duplex transceivers where the use of analogue/digital converter is not an option.
Asym-FDMAC: In-band full-duplex medium access control protocol for asymmetric traffic in wireless LAN
TL;DR: An IBFD MAC protocol named Asym-FDMAC, is proposed for infrastructure based WLAN to support asymmetric lengths of traffic for uplink and downlink to derive optimal benefit from in-band full-duplex (IBFD) wireless communications.
A New Full Duplex MAC Protocol to Solve the Asymmetric Transmission Time
Jin-Ki Kim,Won-Kyung Kim,Jae-Hyun Kim +2 more
- 01 Dec 2015
TL;DR: The simulation results show that throughput of the proposed full duplex MAC protocol is better than traditional full dupLex MAC protocol or half duplex as maximum MAC protocol data unit (MPDU) size is bigger and in terms of power consumption, the proposal shows better performance compare to others.
Widely Linear Digital Self-Interference Cancellation in Direct-Conversion Full-Duplex Transceiver
TL;DR: The analysis shows that after realistic antenna isolation and RF cancellation, the dominant self-interference waveform at the receiver digital baseband can be modeled through a widely linear transformation of the original transmit data, opposed to classical purely linear models.
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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.