Results 21 to 30 of about 3,213,319 (172)
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
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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
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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Performance Evaluation of a 112‑Gbps Dual‑Polarization 16‑QAM Coherent Optical Fiber Link with DSP‑Enabled OSNR and Reach Optimization [PDF]
International Journal of Mathematical, Engineering and Management SciencesThis paper presents a numerical investigation of a 112 Gbps dual‑polarization (DP)-16-quadrature amplitude modulation (QAM) coherent optical fiber link employing a digital signal processing (DSP) chain that includes dispersion and nonlinearity ...
Jaspreet Kaur +2 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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Nondata-aided error vector magnitude performance analysis over κ−μ shadowed fading channel
Tongxin xuebao, 2018 The performance prediction of wireless system over κ−μ shadowed fading channels was a challenging problem of wireless communications,which affects transmission scheme design seriously.To solve this problem,a novel method of quantifying the κ−μ shadowed ...
Fan YANG +6 more
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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
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IEEE Access, 2022 Error vector magnitude (EVM) and out-of-band emissions are key metrics for evaluating in-band and out-band distortions introduced by all potential non-idealities in the transmitters of wireless systems. As EVM is a measure of the quality of the modulated
Angela Hernandez-Solana +5 more
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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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Sensors, 2018 The high demand for multimedia applications in environmental monitoring, invasion detection, and disaster aid has led to the rise of wireless sensor network (WSN).
Fan Yang +5 more
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