Results 1 to 10 of about 46,201 (198)
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
europepmc +8 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
doaj +4 more sources
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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Amplify–Quantize–Forward Relay Channel With Quadrature Amplitude Modulation
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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Computers, 2022 This study proposed a two-stage method, which combines a convolutional neural network (CNN) with the continuous wavelet transform (CWT) for multiclass modulation classification. The modulation signals’ time-frequency information was first extracted using
Ahmed Mohammed Abdulkarem +8 more
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IEEE Access, 2021 In order to pursue rapid development of the new generation of wireless communication systems and elevate their security and efficiency, this paper proposes a novel scheme for automatic dual determination of modulation types and signal to noise ratios ...
Tarik Adnan Almohamad +5 more
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Transmit Antenna Selection for Spatial Modulation Based on Hexagonal Quadrature Amplitude Modulation
Journal of Innovative Science and Engineering, 2021 There is a tremendous demand from various industries for next-generation 5G networks, which has dramatically increased the need for high data rates and energy efficiency.
Fatih COGEN, Erdoğan AYDIN
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Method of 128-position quadrature amplitude-polarization manipulation
Научный вестник МГТУ ГА, 2022 The functioning of modern digital communication systems tends to occur in a complex interference environment. The communication system is affected by various types of jamming: both natural noises associated with the conditions of radio waves propagation,
P. E. Korneev
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A 40–50 GHz RF Front-End with Integrated Local Oscillator Leakage Calibration
Micromachines, 2023 This article presents a transmitter (TX) front-end operating at frequencies covering 40–50 GHz, including a differential quadrature mixer with integrated amplitude and phase imbalance tuning, a power amplifier, and a detection mixer (DM) that supports ...
Peigen Zhou +4 more
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IEEE Photonics Journal, 2014 We experimentally demonstrate a 429.96-Gb/s signal transmission over a 400-km standard single-mode fiber within the 50-GHz grid and successfully achieve spectral efficiency as high as 8.63 bit/s/Hz.
Chao Li +8 more
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