Results 81 to 90 of about 6,147,351 (173)

Reliable, Optically Augmented RF Reference Distribution with Femtosecond Stability

State of the art Free Electron Lasers have rigorous electron beam stability requirements. To fulfill these requirements the low-level RF systems rely on a phase stable RF reference.
Ludwig, Frank, Lamb, Thorsten, Schütte, Maximilian, Schulz, Sebastian, Schlarb, Holger, Pryschelski, Heinrich   +5 more
core  

RF applications in digital signal processing

, 2008
Ever higher demands for stability, accuracy, reproducibility, and monitoring capability are being placed on Low-Level Radio Frequency (LLRF) systems of particle accelerators.
Schilcher, T. (author)
core   +1 more source

A discrete oscillator phase noise effect applied within phase-shift keying RF digital signal modulation

, 2015
This paper presents a simple digital signal modulation/demodulation technique for the purpose of radiofrequency (RF) communications that involves the control of smooth phase amplitude oscillations within a carrier signal.
Simeoni, Ricardo, Ricardo J. Simeoni
core   +1 more source

Thermal spectrometer for superconducting circuits

Nature Communications
Superconducting circuits provide a versatile and controllable platform for studies of fundamental quantum phenomena as well as for quantum technology applications. A conventional technique to read out the state of a quantum circuit or to characterize its
Christoforus Dimas Satrya, Yu-Cheng Chang, Aleksandr S. Strelnikov, Rishabh Upadhyay, Ilari K. Mäkinen, Joonas T. Peltonen, Bayan Karimi, Jukka P. Pekola   +7 more
doaj   +1 more source

RF Phase Reference Distribution for the European XFEL

, 2015
The RF Phase Reference Distribution system followed by the LLRF control system must assure precise stabilization of the RF field withinthe accelerating cavities of the European XFEL accelerator. The required amplitude and phase accuracy respectively dA/A
Schlarb, H., Sikora, D., Kołcz, D., Czuba, K., Ludwig, F., Jatczak, P., Papis, R.   +6 more
core  

A Lightweight UAV RF Identification Method Based on Transient Envelope Modulation Spectrogram Images

Tongxin xuebao
In response to the requirements of accuracy, real-time performance, and edge inference efficiency for identity recognition in non-cooperative low-altitude UAV surveillance, this paper proposes a lightweight RF identity recognition method based on ...
AYINUER Nuertai, ZHANG Pinchang, DONG Jiankuo, SHEN Yuanzhang, FAN Weibei, XIAO Fu   +5 more
doaj  

Silicon-photonic-assisted on-chip RF signal processing

, 2018
We present a Silicon-photonic-assisted RF signal processing, in particular, frequency up conversion and RF pulse generation. For frequency up-conversion, we use compact silicon PN micro-ring modulator to frequency double the input RF signal ...
Jeyaselvan, Vadivukkarasi, Selvaraja, Shankar Kumar   +1 more
core  

INEMO: Distributed RF-Based Indoor Location Determination with Confidence Indicator

EURASIP Journal on Advances in Signal Processing, 2008
Using radio signal strength (RSS) in sensor networks localization is an attractive method since it is a cost-efficient method to provide range indication.
Shen Xingfa, Li Hongbin, Zhao Jun, Wang Zhi, Sun Youxian   +4 more
doaj  

Geo2SigMap: High-Fidelity RF Signal Mapping Using Geographic Databases [PDF]

Radio frequency (RF) signal mapping, which is the process of analyzing and predicting the RF signal strength and distribution across specific areas, is crucial for cellular network planning and deployment. Traditional approaches to RF signal mapping rely
Li, Yiming, Li, Zeyu, Gao, Zhihui, Chen, Tingjun   +3 more
core   +1 more source

How Accurate Are Low-Cost Air Quality Sensors? A 10-Month Study of Three-Tier Comparison with Three Calibration Methods and Cross-Site Transferability. [PDF]

Sensors (Basel)
Mercado-Velazquez AA, Escamilla-Ambrosio PJ, Bodanese E, Islam M, Toosy F, Mosler G, Poslad S.   +6 more
europepmc   +1 more source