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Multi-branch Transmitter for Indoor Visible Light Communication Systems
One of the main aims of indoor visible light communication (VLC) systems...
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Resolving SINR Queries in a Dynamic Setting
We consider a set of transmitters broadcasting simultaneously on the sam...
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3D Channel Modeling and Characterization for Hypersurface Empowered Indoor Environment at 60 GHz Millimeter-Wave Band
This paper proposes a three-dimensional (3D) communication channel model...
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Estimating the Relative Speed of RF Jammers in VANETs
Vehicular Ad-Hoc Networks (VANETs) aim at enhancing road safety and prov...
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On the Spatial Performance of Users in Indoor VLC Networks with Multiple Reflections
In this paper, we present a stochastic geometry based framework to analy...
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2DR: Towards Fine-Grained 2-D RFID Touch Sensing
In this paper, we introduce 2DR, a single RFID tag which can seamlessly ...
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Signaling to Relativistic Observers: An Einstein-Shannon-Riemann Encounter
A thought experiment is described involving a series of events triggered...
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On Measurement of the Spatio-Frequency Property of OFDM Backscattering
Orthogonal frequency-division multiplexing (OFDM) backscatter system, such as Wi-Fi backscatter, has recently been recognized as a promising technique for the IoT connectivity, due to its ubiquitous and low-cost property. This paper investigates the spatial-frequency property of the OFDM backscatter which takes the distance and the angle into account in different frequency bands. We deploy three typical scenarios for performing measurements to evaluate the received signal strength from the backscatter link. The impact of the distances among the transmitter, the tag and the receiver, as well as the angle between the transmitter and the tag is observed through the obtained measurement data. From the evaluation results, it is found that the best location of tag is either close to the receiver or the transmitter which depends on the frequency band, and the best angle is 90 degrees between the transmitter and the receiver. This work opens the shed light on the spatial deployment of the backscatter tag in different frequency band with the aim of improving the performance and reducing the interference.
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