Results 21 to 30 of about 5,536 (185)
Optimized Silicon QPSK Modulator With 64-Gb/s Modulation Speed
IEEE Photonics Journal, 2015 We demonstrate a compact silicon quadrature phase-shift keying (QPSK) modulator consisting of two nested Mach-Zehnder interferometers with a size of 4.5-mm2. The V11 · L of the modulator is 1.4 V · cm with an insertion loss of 8 dB.
Haike Zhu +8 more
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IEEE Access, 2022 Envisaged network scaling in the beyond 5G and 6G era makes the optical transport of high bandwidth radio signals a critical aspect for future radio access networks (RANs), while the move toward wireless transmission in millimeter-wave (mm-wave) and ...
Colm Browning +3 more
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Simultaneous Dual Band Transmission Over Multimode Fiber-Fed Indoor Wireless Network [PDF]
, 2006 Performance measurements of different combinations of digital enhanced cordless telecommunications packet radio service, global system for mobile communications, universal mobile telecommunication service, and 802.11g (54 Mbps) signals in a dual band ...
Batchelor, John C. +7 more
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Nondata-aided error vector magnitude based adaptive modulation over rapidly time-varying channels
Tongxin xuebao, 2017 A novel nondata-aided error vector magnitude based adaptive modulation(NDA-EVM-AM) was proposed to solve the problem of lower spectral efficiency over rapidly time-varying wireless channels.Namely,NDA-EVM was considered as a metric to reflect the rapid ...
Fan YANG +5 more
doaj +2 more sources
On the Equalization of an OFDM-Based Radio-over-Fiber System Using Neural Networks [PDF]
Radioengineering, 2017 In this study the impact of a Radio-over-Fiber (RoF) subsystem on the performance of Orthogonal Frequency Division Multiplexing (OFDM) system is evaluated.
L. Safari +3 more
doaj
Ingeniería Investigación y Desarrollo, 2016 This paper presents an approach for dynamic reconfiguration of wavelength channels for future indoor network architectures. The approach exploits the tunability and the rejection profile of Fiber Bragg Gratings (FBG) to implement service distribution ...
Gustavo Adolfo Puerto-Leguizamón +2 more
doaj +1 more source
On the error vector magnitude as a performance metric and comparative analysis
, 2006 In this paper, we present the error vector magnitude (EVM) as a a figure of merit for assessing the quality of digitally modulated telecommunication signals.
Ashraf, Nabil Shovon +3 more
core +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
IEEE Photonics Journal, 2022 An all-optical aggregator consisting of time-lens and a phase reloader for two four-channel multiplexed quadrature phase shift keying (QPSK) signals to a wavelength division multiplexed (WDM) 16-ary quadrature amplitude modulation (16QAM) signal is ...
Yu Ding +3 more
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EVM as generic QoS trigger for heterogeneous wieless overlay network
, 2010 Fourth Generation (4G) Wireless System will integrate heterogeneous wireless overlay systems i.e. interworking of WLAN/ GSM/ CDMA/ WiMAX/ LTE/ etc with guaranteed Quality of Service (QoS) and Experience (QoE).QoS(E) vary from network to network and is ...
Kumar, Rajender, Singh, Brahmjit
core +1 more source