Results 21 to 30 of about 1,635,520 (251)
Design and Implementation of an N-type Integer Phase-locked Loop with Low Phase Noise and Two Output Frequencies at 1 and 4 GHz [PDF]
International Journal of Industrial Electronics, Control and OptimizationThis article presents development and implementation of an integer N-type Phase Locked Loop (PLL) module with two output frequencies of 1 and 4 GHz, each having a phase noise better than -110dBC/Hz@10k. The structure has 0 and 10dBm power levels at 1 and
Hamid Kazemi Karyani +1 more
doaj +1 more source
Sensors, 2021 The low-level radio frequency (LLRF) control system is one of the fundamental parts of a particle accelerator, ensuring the stability of the electro-magnetic (EM) field inside the resonant cavities. It leverages on the precise measurement of the field by
Tomasz Kowalski +7 more
doaj +1 more source
Applied Sciences, 2023 The frequency synthesizer plays a crucial role in atomic clock technology. In this study, we demonstrate a direct microwave frequency synthesizer for a cesium atomic clock, employing frequency multiplication and a dual-phase-locked loop mode.
Guangkun Guo +5 more
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Constrained Phase Noise Estimation in OFDM Using Scattered Pilots Without Decision Feedback [PDF]
, 2016 In this paper, we consider an OFDM radio link corrupted by oscillator phase noise in the receiver, namely the problem of estimating and compensating for the impairment.
Mathecken, Pramod +3 more
core +2 more sources
Phase-noise limitations in continuous-variable quantum key distribution with homodyne detection [PDF]
, 2017 In continuous-variables quantum key distribution with coherent states, the advantage of performing the detection by using standard telecoms components is counterbalanced by the lack of a stable phase reference in homodyne detection due to the complexity ...
Corvaja, Roberto
core +1 more source
Unified Constellation Design Using Projection Over QAM: Concept and Examples
IEEE Open Journal of the Communications Society, 2023 Beyond fifth generation (B5G) / sixth generation (6G) wireless systems require full utilization of all spectrums. However, hardware devices operating in the high-frequency bands bring a series of non-ideal behaviors, including nonlinear distortion caused
Xiaorui Yan +6 more
doaj +1 more source
IEEE Open Journal of the Communications Society, 2023 This paper considers a multi-user multiple-input multiple-output (MU-MIMO) system with independent phase noise (PN) at user terminals (UTs) due to non-synchronous noisy local oscillators.
Xiaochen He +5 more
doaj +1 more source
Joint Effect of Heterogeneous Intrinsic Noise Sources on Instability of MEMS Resonators [PDF]
Electronics, 2015 This article's focus is on the numerical estimation of the overall instability of microelectromechanical-system-based (MEMS) resonators, caused by intrinsic noise mechanisms that are different in nature (electrical, mechanical or chemical). Heterogeneous
Olga Jakšić +6 more
doaj +1 more source
Design of a Miniaturized Low Noise 10 MHz Crystal Oscillator for Rubidium Atomic Frequency Standard
Chinese Journal of Magnetic Resonance, 2022 A miniaturized low noise quartz crystal oscillator for rubidium atomic frequency standard (RAFS) was designed in this paper, with the oscillation circuit applying Colpitts parallel configuration and SC-cut crystal resonator.
WAN Wen-jie +4 more
doaj +1 more source
Reducing Phase Noise in Multi-Phase Oscillators [PDF]
IEEE Transactions on Circuits and Systems I: Regular Papers, 2016 This paper investigates phase noise mechanism in arrays of resonant LC oscillators. Such arrays represent today a promising solution for the generation of multi-phase signals needed in several advanced applications. The analysis presented in this paper relies on consolidated phase-domain macromodels as well as on the original concept of noise transfer ...
MAFFEZZONI, PAOLO +3 more
openaire +5 more sources