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This Letter presents a V-band gapless orthogonal frequency division multiplexing (OFDM) RoF system at 60 GHz employing a power detector to support vector signal down-conversion. Additional RF tone is generated and transmitted from a central station to replace the local oscillator at a wireless receiver for power detector down-conversion. To enhance the spectrum efficiency, the gap between the OFDM signal and the RF tone is not needed. However, the down-converted signal will suffer signal-to-signal interference (SSBI). In this Letter, we propose and successfully employ a novel Volterra nonlinear compensation to mitigate SSBI, resulting in a 22% data rate improvement with a bit-loading algorithm.
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http://dx.doi.org/10.1364/OL.42.000207 | DOI Listing |
Phys Rev Lett
August 2025
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
Using e^{+}e^{-} collision data collected with the BESIII detector operating at the Beijing electron positron collider, the cross section of e^{+}e^{-}→π^{+}π^{-}h_{c} is measured at 59 points with center-of-mass energy sqrt[s] ranging from 4.009 to 4.950 GeV with a total integrated luminosity of 22.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China.
A highly sensitive, self-powered position-sensitive detector (PSD) based on a PEDOT:PSS/Si heterojunction is prepared. Band structure optimization via FS-300 additive doping significantly enhances the built-in electric field, achieving a maximum open-circuit voltage of 0.45 V (0.
View Article and Find Full Text PDFNeurotrauma Rep
August 2025
Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China.
Accurate differentiation between persistent vegetative state (PVS) and minimally conscious state and estimation of recovery likelihood in patients in PVS are crucial. This study analyzed electroencephalography (EEG) metrics to investigate their relationship with consciousness improvements in patients in PVS and developed a machine learning prediction model. We retrospectively evaluated 19 patients in PVS, categorizing them into two groups: those with improved consciousness ( = 7) and those without improvement ( = 12).
View Article and Find Full Text PDFHardwareX
September 2025
School of Biological Sciences, University of Utah, Salt Lake City, UT, United States of America.
The instrument described in this article measures the absorbance of visible light (with wavelengths in the range of approximately 400 to 650 nm) by liquid samples, a method widely used for determining solute concentrations. To minimize the cost of the instrument, interchangeable light-emitting diodes (LEDs) are used as light sources. Transmitted light is detected using a photodiode device and the signals are processed using an Arduino microprocessor board.
View Article and Find Full Text PDFAnal Chim Acta
November 2025
Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), Universidade Estadual de Campinas (UNICAMP), Rua Pedro Zaccaria 1300, Limeira, 13484-350, São Paulo, Brazil. Electronic address:
Background: Monitoring industrial processes is critical for ensuring consistent product quality, as consumers expect uniformity across different production batches. In the case of herbal extracts, such as rosemary hydroalcoholic extracts, it is essential to control the yield of target compounds to maintain both the expected quality and safety. Typically, these extracts are produced in an extractor and then analyzed separately in a laboratory (offline).
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