Single-photon frequency shifting with a quadrature phase-shift keying modulator [PDF]
Scientific Reports, 2021 Deterministic frequency manipulation of single photons is an essential tool for quantum communications and quantum networks. We demonstrate a 15.65 GHz frequency shift for classical and nonclassical light using a commercially available quadrature phase ...
Changchen Chen +3 more
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A Novel Sample Based Quadrature Phase Shift Keying Demodulator [PDF]
The Scientific World Journal, 2014 This paper presents a new practical QPSK receiver that uses digitized samples of incoming QPSK analog signal to determine the phase of the QPSK symbol.
Asraf Mohamed Moubark +1 more
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50-Gb/s silicon quadrature phase-shift keying modulator
Optics Express, 2012 We report the first successful demonstration of quadrature phase-shift keying (QPSK) modulation using two nested silicon Mach-Zehnder modulators. 50-Gb/s QPSK signal is generated with only 2.7-dB optical signal-to-noise ratio penalties from the theoretical limit at a bit-error ratio of 10(-3).
Po Dong +4 more
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Benefits and Limits of Modulation Formats for Optical Communications [PDF]
Advances in Electrical and Electronic Engineering, 2014 This paper is focused on benefits and limits of intensity and phase modulation formats used in optical communications. The simulation results are obtained using OptSim software environment, employing Time Domain Split Step method.
Rajdi Agalliu, Michal Lucki
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Quadrature phase shift keying coherent state discrimination via a hybrid receiver [PDF]
New Journal of Physics, 2012 We propose and experimentally demonstrate a near-optimal discrimination scheme for the quadrature phase shift keying (QPSK) protocol. We show in theory that the performance of our hybrid scheme is superior to the standard scheme—heterodyne detection—for ...
C R Müller +6 more
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Quadrature Phase Shift Keying (QPSK) Modulator Design using Multi-Port Network in Multilayer Microstrip-Slot Technology for Wireless Communication Applications [PDF]
, 2015 The design of the quadrature phase shift keying (QPSK) modulator by using a multi-port network is proposed in this article for the use in wireless communication applications. The multi-port network is in the form of multilayer microstrip-slot technology.
Mohamed Ghazali, S. N. A., Seman, N.
core +3 more sources
International Journal of Electrical and Computer Engineering (IJECE), 2023 A single-phase/single-loop multiple-phase-shift-keying (<em><span lang="EN-US">m</span></em><span lang="EN-US">-PSK)</span><span lang="EN-US"> demodulator is described. The demodulator relies on a linear range of an exclusive-OR (XOR) gate employed as a phase detector.
Apinut Kaewmunee, Phanumas Khumsat
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Capacity of a communication channel with quadrature phase-shift keying and phase quantization
Учёные записки Казанского университета: Серия Физико-математические наукиThe influence of the number of phase quantization levels L on the capacity CM,L of a communication channel with additive white Gaussian noise (AWGN) was studied in a communication system using QPSK (4-PSK).
Yu. A. Brychkov, N. V. Savischenko
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Demonstrating Doubly-Differential Quadrature Phase Shift Keying in the Optical Domain [PDF]
IEEE Photonics Technology Letters, 2013 We report for the first time the experimental demonstration of doubly differential quadrature phase shift keying (DDQPSK) using optical coherent detection. This method is more robust against high frequency offsets (FO) than conventional single differential quadrature phase shift keying (SDQPSK) with offset compensation.
Anthony J. Walsh +6 more
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Performance analysis and optimization of modulation techniques for underwater optical wireless communication in varied aquatic environments [PDF]
Scientific ReportsUnderwater Optical Wireless Communication (UOWC) has emerged as a promising technology for enabling high-speed and low-latency data transmission in aquatic environments.
M. Mokhtar Zayed, Mona Shokair
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