Results 61 to 70 of about 11,372 (191)
A peak power reduction method for multicarrier transmission
ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2001 A method to reduce the peak-to-average power ratio (PAR) of multicarrier signals has been developed. The method enlarges the quadrature amplitude modulation (QAM) constellation size at tones so that several signal points represent the same information. It chooses a signal point among equivalent signal points that minimises PAR. The method achieved more
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Multicarrier 16QAM transmission with diversity reception
Electronics Letters, 1996 A 96 multicarrier 16QAM transmitter and a diversity receiver for 3.072 Mbit/s data transmission are described. Pilot symbol aided (PSA) coherent detection is applied. A laboratory experiment demonstrates that an irreducible bit error rate (BER) of 10-3 can be achieved at the RMS delay spread τrms = 6.3 µs under frequency selective Rayleigh fading when ...
M. Sawahashi, F. Adachi
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Energy Science &Engineering, Volume 13, Issue 9, Page 4633-4655, September 2025.ABSTRACT This study reviews recent developments in optimization techniques for hybrid solar photovoltaic and wind energy systems, particularly those using artificial intelligence (AI) and hybrid algorithms. Due to the global need for sustainable energy, the study compares both traditional and modern optimization techniques.
Ibrahim Seidu +6 more
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Infrared Colloidal Quantum Dot Lasers
Advanced Optical Materials, Volume 13, Issue 24, August 25, 2025.Infrared colloidal quantum dot (CQD) lasers represent an emerging platform for a wide range of infrared applications including free‐space optical telecommunications, LIDAR, biomedical diagnostics, and on‐chip photonics. CQDs offer spectral tunability, and low‐cost solution‐processed fabrication, enabling seamless integration into next‐generation ...
Nima Taghipour, Gerasimos Konstantatos
wiley +1 more source
Multicarrier transmission using quadrature frequency/phasemodulation
Electronics Letters, 1996 Multicarrier (MC) systems using quadrature frequency and phase modulation (QFPM) schemes called MC-QFPM are described. In MC-QFPM systems, the power efficiency and resistance to delay spread can be increased for the price of reduced bandwidth efficiency. M-ary orthogonal frequency-shift-keying with M = 1, 2 and 4 are considered along with MC modulation.
Hüseyin, Bilgekul, Amca, Hasan
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Energy Conversion and Economics, Volume 6, Issue 2, Page 83-100, April 2025.Abstract In integrated energy systems (IESs), thermal energies with different characteristics and efficiencies are typically regarded as having the same thermal energy level, which leads to unreasonable assumptions regarding the thermal energy structure of the system.
Yanjun Jing +7 more
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Energy Technology, Volume 13, Issue 2, February 2025.This article discusses challenges in modeling complex energy systems, focusing on the importance of high spatial and temporal resolution. It proposes a systematic framework for gas network modeling, addressing dimensions, influencing factors, data requirements, development steps, and assessment criteria.
Joachim Müller‐Kirchenbauer +5 more
wiley +1 more source
High Voltage, Volume 10, Issue 1, Page 47-55, February 2025.Abstract Using a field‐programmable gate array (FPGA) as the core computational engine, this paper proposes a digital real‐time electromagnetic transient simulator for a generic power electronic system. The LC switching model is employed for constant network conductance representation. The fully paralleled and pipelined design for network solutions and
Yuan Chen +3 more
wiley +1 more source
Hexagonal Multicarrier Faster-Than-Nyquist Signaling
IEEE Access, 2017 Multicarrier faster-than-Nyquist (MFTN) signaling is a spectral efficient modulation scheme for future communication systems. In MFTN signaling, the intersymbol interference (ISI) and intercarrier interference (ICI) are introduced intentionally by the ...
Siming Peng +3 more
doaj +1 more source
IET Communications, Volume 19, Issue 1, January/December 2025.A multi‐information fusion method is proposed for few‐shot modulation recognition, which involves converting I/Q signals into A/P signals and training with a combination of VGG and LSTM network models. An ensemble knowledge distillation approach is employed to streamline the network model, meeting the demands for deploying neural network models on ...
Qi Yao, Jingjing Yang, Ming Huang
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