Results 71 to 80 of about 18,147 (273)

Sustainable Optimization of Emissions and Performance in Hydrogen Port Injection Diesel Engines Through Port Timing and Injection Duration Modulation

Energy Science &Engineering, EarlyView.
Optimizing hydrogen port injection in diesel engines significantly improves efficiency and reduces emissions, demonstrating a sustainable dual‐fuel strategy for cleaner transportation solutions and lower environmental impact. ABSTRACT This study evaluates a single‐cylinder hydrogen port injection (HPFI) Diesel engine by systematically varying the ...
Kaustubh R. Kapadani, Nithyananda B S, Shrishail B. Sollapur, Rajesh K, Ashish M. Dharme, Hemant K, Nagaraj Ashok, Abhijit Bhowmik   +7 more
wiley   +1 more source

Blind symbol timing offset estimation for offset‐QPSK modulated signals

ETRI Journal, 2019
In this paper, a blind symbol timing offset (STO) estimation method is proposed for offset quadrature phase‐shift keying (OQPSK) modulated signals, which also works for other linearly modulated signals (LMS) such as binary‐PSK, QPSK, π/4‐QPSK, and ...
Sushant Kumar, Sudhan Majhi
doaj   +1 more source

Performance Analysis of Coherent and Noncoherent Modulation under I/Q Imbalance

, 2017
In-phase/quadrature-phase Imbalance (IQI) is considered a major performance-limiting impairment in direct-conversion transceivers. Its effects become even more pronounced at higher carrier frequencies such as the millimeter-wave frequency bands being ...
Al-Dhahir, Naofal, Karagiannidis, George K., Muhaidat, Sami, Selim, Bassant, Sharif, Bayan S., Sofotasios, Paschalis C., Stouraitis, Thanos   +6 more
core   +1 more source

Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems

Energy Science &Engineering, EarlyView.
This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk, Habib Benbouhenni, Adil Yahdou, Zakaria Mohamed Salem Elbarary, Nicu Bizon   +4 more
wiley   +1 more source

Programmable rate modem utilizing digital signal processing techniques [PDF]

The need for a Programmable Rate Digital Satellite Modem capable of supporting both burst and continuous transmission modes with either Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift Keying (QPSK) modulation is discussed.
Naveh, Arad
core   +4 more sources

QPSK Modulator with Continuous Phase and Fast Response Based on Phase-Locked Loop [PDF]

Radioengineering, 2017
Among M-phase shift keying (M-PSK) schemes, quadrature phase-shift keying (QPSK) is used most often because of its efficient bandwidth consumption. However, in comparison with minimum-shift keying, which has continuous phase transitions, QPSK requires a ...
L. Kirasamuthranon, J. Koseeyaporn, P. Wardkein   +2 more
doaj  

All optical multi‐functional signal processing scheme for D8PSK and DQPSK format using four‐wave mixing in semiconductor optical amplifiers

Engineering Reports, 2022
In this article, a multifunctional optical processing unit for differential eight phase‐shift‐keying (D8PSK) and differential quadrature phase‐shift‐keying (DQPSK) based on four‐wave mixing (FWM) effects in semiconductor optical amplifier (SOA) is ...
Wei Yang, Yafei Wang
doaj   +1 more source

BER evaluation of post-meter PLC services in CENELEC-C band [PDF]

, 2017
Low voltage, in-home power-line communications (PLC) networks allow direct communication between smart meters (SM) and in-home devices (IHD). In order to minimize security issues, in many deployment scenarios transmission takes place only towards the IHD
Bregni, S., Kumar, A., Magarini, M., Moaveninejad, Sadaf, Piti, A., Scazzoli, D., Verticale, G.   +6 more
core   +1 more source

A Hybrid EV Charging Architecture Integrating DC Fast Charging and Wireless Power Transfer

Energy Science &Engineering, EarlyView.
A hybrid EV charging architecture combining DC fast charging and wireless power transfer is proposed. The system achieves high efficiency, grid compliance, and reliable bidirectional operation, offering a scalable solution that enhances user convenience while paving the way for smarter, future‐ready EV charging infrastructure.
Ali Almaktoof, Mohamad Taha, Marco Adonis, Kareem Halablab   +3 more
wiley   +1 more source

Symbol error rate analysis for M-QAM modulated physical-layer network coding with phase errors

, 2012
Recent theoretical studies of physical-layer network coding (PNC) show much interest on high-level modulation, such as M-ary quadrature amplitude modulation (M-QAM), and most related works are based on the assumption of phase synchrony.
Huang, Y, Jamalipour, A, Song, Q, Wang, S   +3 more
core   +1 more source