Proceedings ArticleDOI
Full duplex radios
Dinesh Bharadia,Emily McMilin,Sachin Katti +2 more
- Vol. 43, Iss: 4, pp 375-386
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TLDR
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.Abstract:
This paper presents 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 and achieves close to the theoretical doubling of throughput in all practical deployment scenarios. Our design uses a single antenna for simultaneous TX/RX (i.e., the same resources as a standard half duplex system). We also propose novel analog and digital cancellation techniques that cancel the self interference to the receiver noise floor, and therefore ensure that there is no degradation to the received signal. We prototype our design by building our own analog circuit boards and integrating them with a fully WiFi-PHY compatible software radio implementation. We show experimentally that our design works robustly in noisy indoor environments, and provides close to the expected theoretical doubling of throughput in practice.read more
Citations
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Journal ArticleDOI
Energy-Recycling Full-Duplex Radios for Next-Generation Networks
TL;DR: In this article, a new three-port element including a power divider and an energy harvester is added between the circulator and the receiver (RX) chain, which provides the means of performing both an arbitrary attenuation of the incoming signal, which in turn increases the effectiveness of the state-of-the-art selfinterference cancellation strategies subsequently adopted in the RX chain, and the recycling of a non-negligible portion of the energy leaked through the nonideal circulator.
Journal ArticleDOI
In-Band $\alpha $ -Duplex Scheme for Cellular Networks: A Stochastic Geometry Approach
TL;DR: In this paper, a fine-grained duplexing scheme, denoted as the $\alpha $ -duplex scheme, which allows a partial overlap between the uplink and the downlink frequency bands was proposed.
Journal ArticleDOI
Adaptive RF Front-Ends Using Electrical-Balance Duplexers and Tuned SAW Resonators
Barend van Liempd,Akshay Visweswaran,Saneaki Ariumi,Shinya Hitomi,Piet Wambacq,Jan Craninckx +5 more
TL;DR: In this article, an adaptive RF front-end (RFFE) architecture that uses an electrical-balance duplexer (EBD) and tuned surface acoustic wave (SAW) resonators to enable adaptive dual-frequency isolation suited for LTE's frequency-division duplex (FDD) mode of operation.
Proceedings ArticleDOI
Joint subcarrier assignment and power allocation in full-duplex OFDMA networks
TL;DR: This paper develops an iterative solution that achieves local Pareto optimality in typical scenarios and empirically achieves near-optimal performance and outperforms other resource allocation schemes designed for half-duplex networks.
Journal ArticleDOI
Virtual Full-Duplex Buffer-Aided Relaying in the Presence of Inter-Relay Interference
Su Min Kim,Mats Bengtsson +1 more
TL;DR: This paper proposes joint RS and BF schemes taking IRI into consideration by using multiple antennas at the relays, and proposes a weighted sum-rate maximization strategy assuming that adaptive rate transmission is employed in both the source to relay and relay to destination links.
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TL;DR: In this article, the authors present an expanded and thoroughly revised edition of Tom Lee's acclaimed guide to the design of gigahertz RF integrated circuits, which is packed with physical insights and design tips, and includes a historical overview of the field in context.