EKF for Joint Mitigation of Phase Noise, Frequency Offset and Nonlinearity in 400 Gb/s PM-16-QAM and 200 Gb/s PM-QPSK Systems
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2017.2649223
Abstract: The performance of higher order modulation formats such as 16-quadrature amplitude modulation (QAM) coherent optical communication systems are limited due to several linear and nonlinear impairments such as phase noise, frequency offset, chromatic dispersion, and… read more here.
Keywords: phase; phase noise; noise frequency; frequency offset ... See more keywords
A Low-Noise Frequency Synthesizer Using Multiphase Generation and Combining Techniques
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Journal of Solid-State Circuits"
DOI: 10.1109/jssc.2019.2951384
Abstract: A ring oscillator (RO)-based low-noise frequency synthesizer is presented. Phase noise degradation caused by jitter accumulation in conventional RO-based synthesizers is alleviated by increasing the update rate. To this end, multiple phases of the crystal… read more here.
Keywords: noise frequency; frequency; clock; low noise ... See more keywords
A 23–36.8-GHz Low-Noise Frequency Synthesizer With a Fundamental Colpitts VCO Array in SiGe BiCMOS for 5G Applications
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Very Large Scale Integration (VLSI) Systems"
DOI: 10.1109/tvlsi.2020.3014962
Abstract: This article describes a wideband low-noise frequency synthesizer implemented in 0.13- $\mu \text{m}$ SiGe BiCMOS process for 5G millimeter-wave applications. To extend the frequency range while reducing the phase noise, a fundamental voltage-controlled oscillator (VCO)… read more here.
Keywords: frequency synthesizer; frequency; low noise; noise frequency ... See more keywords
Experimental Study on Radiation Noise Frequency Characteristics of a Centrifugal Pump with Various Rotational Speeds
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DOI: 10.3390/app8050796
Abstract: To investigate the radiation noise frequency characteristics of a centrifugal pump under various rotational speeds, a noise measurement system was established in a soundproof room. Sixteen monitoring points were evenly arranged in a circumferential direction… read more here.
Keywords: frequency; frequency characteristics; radiation noise; noise frequency ... See more keywords