Results 31 to 40 of about 3,213,319 (172)
Integrating Radio-Over-Fiber Communication System and BOTDR Sensor System
Sensors, 2020 In this paper, we propose and experimentally demonstrate for the first time, the integration of a radio-over-fiber (RoF) communication system and a Brillouin optical time-domain reflectometry (BOTDR) distributed sensor system using a single optical fiber
Wai Pang Ng +7 more
doaj +1 more source
Theoretical Analysis of Hole Punch Signal Conditioning for High Efficiency EER Power Amplifiers
EURASIP Journal on Wireless Communications and Networking, 2010 High efficiency and linearity can be achieved using Kahn's envelope elimination and restoration (EER) technique. However, when used with modulation schemes such as code division multiple access (CDMA) and orthogonal frequency division multiplexing ...
Abdul K. Mustafa, Mike Faulkner
doaj +2 more sources
Investigation of error vector magnitude measurement method in digital wireless system. [PDF]
, 2016 The need of reducing time for testing radio systems is described in this work. In literature review various methods and models were analyzed for error vector magnitude measurements.
Karaliūnas, Marius,
core +1 more source
IET Communications, 2022 Direct RF sampling has been suggested as a solution for receivers that are flexible in frequency and across standards, while utilising only a single radio frequency front‐end.
Stephen Henthorn +2 more
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Aerogel Antennas Communications Study Using Error Vector Magnitude Measurements [PDF]
, 2014 This paper discusses an aerogel antennas communication study using error vector magnitude (EVM) measurements. The study was performed using 4x2 element polyimide (PI) aerogel-based phased arrays designed for operation at 5 GHz as transmit (Tx) and ...
Meador, Mary Ann B. +5 more
core +1 more source
Multi‐Dimensional Physical‐Layer Security via Digitally Mediated Space–Time Modulation
Advanced Science, EarlyView.Digitally mediated space–time modulation moves radiation control beyond hardware‐bound switching. Multiple information‐bearing and masking waveforms are jointly synthesized at baseband and coherently coupled to simple periodic time modulation, enabling programmable, independently directed multi‐beam radiation without increasing switching‐state ...
Kejin Chen +8 more
wiley +1 more source
Study on adaptive modulation in D2D communications over Nakagami-m fading channel
Tongxin xuebao, 2018 A novel adaptive modulation based on nondata-aided error vector magnitude (NDA-EVM) was proposed to solve the problem of lower spectral efficiency in device to device (D2D) communication over Nakagami-m fading channel.The NDA-EVM was used to evaluate the
Xiaoping ZENG +6 more
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Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Driven by the energy crisis and carbon neutrality goals, high‐efficiency heat exchange equipment has become a core demand in the industrial sector. The spiral grooved double‐pipe heat exchanger exhibits significant heat transfer enhancement advantages, yet it requires balancing heat transfer efficiency and pressure loss.
Yueyun Yang, Wei Li, Xiuzhi Xi, Neng Gao
wiley +1 more source
Robust adaptive beamforming using a Bayesian steering vector error model [PDF]
, 2013 We propose a Bayesian approach to robust adaptive beamforming which entails considering the steering vector of interest as a random variable with some prior distribution.
Bidon, Stéphanie, Besson, Olivier
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Bidirectional single sideband transmission of Millimeter Wavesover Fiber for 5G Mobile Networks
TecnoLógicas, 2018 This study proposes, experimentally demonstrates, and simulates anetwork architecture for the transport of millimeter waves (MMW) based on Radio over Fiber (RoF) techniques for the transport of signals in the fronthaul segment of
Alejandro Patiño-Carrillo +2 more
doaj +1 more source