Results 1 to 10 of about 145,584 (294)
Amplify–Quantize–Forward Relay Channel With Quadrature Amplitude Modulation [PDF]
IEEE Access, 2022 This paper considers an amplify–quantize–forward (AQF) relay channel with $M$ -ary quadrature amplitude modulation, where the relay implements a uniform quantization for the amplified received signal and forwards it to the destination. Two
Xianglan Jin
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Modulator-free quadrature amplitude modulation signal synthesis. [PDF]
Nat Commun, 2014 AbstractThe ability to generate high-speed on–off-keyed telecommunication signals by directly modulating a semiconductor laser’s drive current was one of the most exciting prospective applications of the nascent field of laser technology throughout the 1960s.
Liu Z +6 more
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Single sideband quadrature amplitude modulation
Radioelectronics and Communications Systems, 2017 Anew modulation scheme—single sideband quadrature amplitude modulation (SSB QAM) is proposed. This scheme allows to decrease the spectral width of the transferred signal by two times as opposed to the traditional quadrature amplitude modulation, while maintaining its spectral efficiency.
Александр Борисович Коханов
semanticscholar +5 more sources
Asymptotic Security of Continuous-Variable Quantum Key Distribution with a Discrete Modulation
Physical Review X, 2019 We establish a lower bound on the asymptotic secret key rate of continuous-variable quantum key distribution with a discrete modulation of coherent states.
Shouvik Ghorai +3 more
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Differential Space-Time Coding Scheme Using Star Quadrature Amplitude Modulation Method [PDF]
EURASIP Journal on Advances in Signal Processing, 2006 Differential space-time coding (DSTC) has received much interest as it obviates the requirement of the channel state information at the receiver while maintaining the desired properties of space-time coding techniques. In this paper, by introducing star
Bi Guangguo, Yu Xiangbin, Xu DaZhuan
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Digital Demodulator of the Quadrature Amplitude Modulation Signals [PDF]
Measurement Science Review, 2018 In this paper, the digital algorithm and the device for the demodulation of the quadrature amplitude modulation signals are considered. The fundamental advantages of our approach are simple hardware implementation, minimal number of arithmetic operations
Chernoyarov Oleg +4 more
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Frequency and quadrature amplitude modulation for 5G networks [PDF]
2016 European Conference on Networks and Communications (EuCNC), 2016 The emerging fifth generation (5G) wireless access network, aiming at providing ubiquitous and high data rate connectivity, is envisaged to deploy large number of base stations with higher density and smaller sizes, where inter-cell interference (ICI) becomes a critical problem.
Wu, Shangbin +3 more
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On Probabilistic Shaping of Quadrature Amplitude Modulation for the Nonlinear Fiber Channel [PDF]
Journal of Lightwave Technology, 2016 Different aspects of probabilistic shaping for a multispan optical communication system are studied. First, a numerical analysis of the additive white Gaussian noise (AWGN) channel investigates the effect of using a small number of input probability mass
Tobias Fehenberger +3 more
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Quadrature Null Effect in Amplitude Modulation
International Journal of Technology, 2017 Quadrature null effect (QNE) is a phenomenon in amplitude modulation (AM) demodulator circuit arise if carrier signal generated from local oscillator is not synchronized in phase with input signal. Our main motive is to synchronize phase in this effect by various synchronizing techniques so as to reconstruct input modulated signal completely, are ...
Archi Jain, Divanshu Chhabra
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Coherent 16 Quadrature Amplitude Modulation (16QAM) Optical Communication Systems
Photonics Letters of Poland, 2018 Coherent optical fiber communications for data rates of 100Gbit/s and beyond have recently been studied extensively primarily because high sensitivity of coherent receivers could extend the transmission distance.
Fady I. El-Nahal
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