Results 141 to 150 of about 51,455 (301)
Errors Impacts of Multi-5G Waveforms in Cognitive Radio Systems
Journal of Communications Software and SystemsThe demand for new wireless services within frequency bands has increased due to the exponential growth of wireless communication, leading to issues related to spectrum scarcity.
Mokhalad Alghrairi +4 more
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Approach for determining the optimum pilot placement in orthogonal frequency division multiplexing systems [PDF]
, 2015 Begüm Korunur Engiz +2 more
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Advanced Functional Materials, Volume 36, Issue 1, 2 January 2026.Epitaxial piezoelectric α‐quartz/Si BioNEMS sensors, made using soft chemistry, effectively detect the Chikungunya virus. They have a mass sensitivity of 205 pg Hz−1 in liquid and can detect the virus at a limit of 9 ng mL−1. This development enables high‐frequency mass devices for point‐of‐care testing in healthcare and other electronic applications ...
Raissa Rathar +12 more
wiley +1 more source
Adaptive Orthogonal Frequency Division Multiplexing Schemes
, 1998 This paper investigates the upper-bound performance of subband-adaptive Orthogonal Frequency Division Multiplexing (OFDM) transmission in a time-dispersive channel and the feasibility of blind modulation scheme detection algorithms not requiring modulation scheme signalling information.
Keller, T., Hanzo, L.
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Spectral Efficiency for Orthogonal Frequency Division Multiplexing
International Journal of Advanced Research in Science, Communication and TechnologyOrthogonal Frequency Division Multiplexing (OFDM) is a special form of multicarrier modulation (MCM) with heavily spaced subcarriers as well as overlapping spectra was patented in the United States of America in 70s. Orthogonal Frequency Division Multiplexing has been popularly utilized in modern days due to its ability for spectral efficiency and ...
null Ms. Swarnita Gorakshnath Kale +1 more
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Advanced Materials Technologies, Volume 11, Issue 1, 8 January 2026.The feasibility of 3D‐printed optical antennas using commercial, non‐optical materials for Optical Wireless Communications (OWC) is demonstrated. This study combines spectral analysis, anisotropy effects, and telecom‐relevant optical measurements, revealing promising performance and novel insights for low‐cost, customizable photonic components in ...
Mauro Aresti +6 more
wiley +1 more source
Time‐Domain Near‐Field Scanning Microscopy of Terahertz Metasurfaces
Advanced Photonics Research, Volume 7, Issue 1, January 2026.Time‐domain near‐field scanning terahertz microscopy provides direct access to subwavelength electromagnetic fields on metasurfaces. By combining controlled polarization excitation with nanoscale probing, this technique enables quantitative visualization of localized hotspots, surface‐wave propagation, and wavefront manipulation, offering a powerful ...
Ruxue Wei, Soren Petersen, Weili Zhang
wiley +1 more source
Comparative Analysis between OFDMA and SC-FDMA: Model, Features and Applications
International Journal of Electrical Engineering and Applied Sciences, 2019 This paper represents Orthogonal Frequency Division Multiple Access (OFDMA) and Single Carrier Frequency Division Multiple Access (SCFDMA) techniques along with the Orthogonal Frequency Division Multiplexing (OFDM).
Abdullah Al-Mamun Bulbul +5 more
doaj