Journal ArticleDOI
Analog/RF Solutions Enabling Compact Full-Duplex Radios
Bjorn Debaillie,J.D.A. van den Broek,C. Lavin,B. van Liempd,Eric A.M. Klumperink,C. Palacios,Jan Craninckx,Bram Nauta,Aarno Parssinen +8 more
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TLDR
Two design ideas are proposed, which provide attractive analog/RF-isolation and allow integration in compact radios and combines a dual-port polarized antenna with a self-tunable cancellation circuit.Abstract:
In-band full-duplex sets challenging requirements for wireless communication radios, in particular their capability to prevent receiver sensitivity degradation due to self-interference (transmit signals leaking into its own receiver). Previously published self-interference rejection designs require bulky components and/or antenna structures. This paper addresses this form-factor issue. First, compact radio transceiver feasibility bottlenecks are identified analytically, and tradeoff equations in function of link budget parameters are presented. These derivations indicate that the main bottlenecks can be resolved by increasing the isolation in analog/RF. Therefore, two design ideas are proposed, which provide attractive analog/RF-isolation and allow integration in compact radios. The first design proposal targets compact radio devices, such as small-cell base stations and tablet computers, and combines a dual-port polarized antenna with a self-tunable cancellation circuit. The second design proposal targets even more compact radio devices such as smartphones and sensor network nodes. This design builds on a tunable electrical balance isolator/duplexer in combination with a single-port miniature antenna. The electrical balance circuit can be implemented for scaled CMOS technology, facilitating low cost and dense integration.read more
Citations
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Journal ArticleDOI
A Comprehensive Survey of Pilot Contamination in Massive MIMO—5G System
TL;DR: An extensive survey on pilot contamination in massive MIMO systems is provided, and other possible sources of pilot contamination are identified, which include hardware impairment and non-reciprocal transceivers.
Journal ArticleDOI
Physical Layer Network Security in the Full-Duplex Relay System
TL;DR: Investigating the secrecy performance of full-duplex relay (FDR) networks shows that FDR networks have better secrecy performance than half duplex relay networks, if the self-interference can be well suppressed.
Journal ArticleDOI
Multitap RF Canceller for In-Band Full-Duplex Wireless Communications
TL;DR: A novel tapped delay line RF canceller architecture with multiple non-uniform pre-weighted taps to improve system isolation by cancelling both the direct antenna coupling as well as multipath effects that comprise a typical interference channel is presented.
Journal ArticleDOI
Full-duplex mobile device: pushing the limits
Dani Korpi,Joose Tamminen,Matias Turunen,Timo Huusari,Yang-Seok Choi,Lauri Anttila,Shilpa Talwar,Mikko Valkama +7 more
TL;DR: The findings indicate that deploying the full-duplex principle can indeed also be feasible in mobile devices, and thus be one potential technology in, for example, 5G and beyond radio systems.
Journal ArticleDOI
Integrated Wideband Self-Interference Cancellation in the RF Domain for FDD and Full-Duplex Wireless
TL;DR: A fully integrated technique for wideband cancellation of transmitter (TX) self-interference (SI) in the RF domain is proposed for multiband frequency-division duplexing (FDD) and full-duplex (FD) wireless applications.
References
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Proceedings ArticleDOI
Full duplex radios
TL;DR: The design and implementation of the first in-band full duplex WiFi radios that can simultaneously transmit and receive on the same channel using standard WiFi 802.11ac PHYs are presented and achieves close to the theoretical doubling of throughput in all practical deployment scenarios.
Proceedings ArticleDOI
Achieving single channel, full duplex wireless communication
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.