Results 21 to 30 of about 21,946 (273)

Design of Intelligent Reflecting Surface (IRS)-Boosted Ambient Backscatter Systems

open access: yesIEEE Access, 2022
Passive technologies like ambient backscatter communication (AmBC) and intelligent reflecting surface (IRS) hold enormous potential for ubiquitous connectivity of Internet of Things (IoT) devices in future wireless networks.
Sahar Idrees   +3 more
doaj   +1 more source

Channel Estimation for Ambient Backscatter Communication Systems with Massive-Antenna Reader [PDF]

open access: yes, 2019
Ambient backscatter, an emerging green communication technology, has aroused great interest from both academia and industry. One open problem for ambient backscatter communication (AmBC) systems is channel estimation for a massive-antenna reader. In this
Atapattu, Saman   +4 more
core   +2 more sources

Demo Abstract: Real-Time Ambient Backscatter Demonstration [PDF]

open access: yesIEEE INFOCOM 2019 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS), 2019
To lower power consumption and spectral congestion, it has been proposed to transmit digital informations by modulating the ambient electromagnetic waves emitted by different RF sources such as TV broadcast, Wifi. We have recently developed prototypes of backscatter tags and readers operating in real-time recycling DVB-T and 4G RF fields.
Rachedi, K.   +8 more
openaire   +2 more sources

Stackelberg Game for Distributed Time Scheduling in RF-Powered Backscatter Cognitive Radio Networks [PDF]

open access: yes, 2018
In this paper, we study the transmission strategy adaptation problem in an RF-powered cognitive radio network, in which hybrid secondary users are able to switch between the harvest-then-transmit mode and the ambient backscatter mode for their ...
Hoang, Dinh Thai   +4 more
core   +1 more source

Reconfigurable Intelligent Surface-Assisted Ambient Backscatter Communications – Experimental Assessment [PDF]

open access: yes2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021
Accepted to IEEE International Conference on Communications Workshop on Reconfigurable Intelligent Surfaces for Future Wireless Communications ...
Fara, R.   +5 more
openaire   +2 more sources

Ambient Backscatter Communication Systems: Capacity and Outage Performance Analysis

open access: yesIEEE Access, 2018
Ambient backscatter is an emerging green communication technology that exploits the environmental radio frequency (RF) signals to enable passive devices to communicate with each other.
Wenjing Zhao   +4 more
doaj   +1 more source

The high-frequency backscattering angular response of gassy sediments: Model/data comparison from the Eel River Margin, California [PDF]

open access: yes, 2002
A model for the high-frequency backscatter angular response of gassy sediments is proposed. For the interface backscatter contribution we adopted the model developed by Jackson et al. @J. Acoust. Soc. Am. 79, 1410–1422 ~1986!#, but added modifications to
Driscoll, Neal   +3 more
core   +2 more sources

Adaptive Transmission Repetition and Combining in Bistatic WiFi Backscatter Communications

open access: yesIEEE Access, 2020
Extracting data bits from bistatic-backscattered WiFi signals by threshold-based decoding is challenging due to severe fluctuation of OFDM signals. We propose adaptive transmission repetition to combat this problem.
Hwanwoong Hwang, Ji-Hoon Yun
doaj   +1 more source

Ergodic Rate Analysis of Cooperative Ambient Backscatter Communication [PDF]

open access: yes, 2019
Ambient backscatter communication has shown great potential in the development of future wireless networks. It enables a backscatter transmitter (BTx) to send information directly to an adjacent receiver by modulating over ambient radio frequency (RF ...
Alouini, Mohamed-Slim   +5 more
core   +2 more sources

Signal Detection Scheme in Ambient Backscatter System With Multiple Antennas

open access: yesIEEE Access, 2017
The ambient backscatter technique is a communication technology that uses ambient radio frequency signals to enable battery-free devices to communicate with other device.
Chang-Hee Kang   +3 more
doaj   +1 more source

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