Results 11 to 20 of about 1,345 (198)

Rotative quadrature phase-shift keying

Electronics Letters, 1992
A rotative quadrature phase-shift keying (RQPSK) modulation scheme is proposed. By rotating the QPSK signal constellation by pi/2, either clockwise or anticlockwise, during a symbol duration, the conventional QPSK scheme can be modified to transmit 3 bits per symbol to achieve both power and bandwidth efficiency.
J. Liu, J. Kim, S.C. Kwatra, G.H. Stevens   +3 more
openaire   +1 more source

Quadrature‐carrier amplitude phase shift keying

IET Communications, 2019
Amplitude phase shift keying (APSK) is the emerging modulation scheme used in deep satellite communications and known to have a high spectral and energy efficiency among other two‐dimensional (2‐D) M‐ary schemes.
Abdulkerim Öztekin, Ergun Erçelebi
openaire   +1 more source

Nonlinear Silicon Photonic Signal Processing Devices for Future Optical Networks

Applied Sciences, 2017
In this paper, we present a review on silicon-based nonlinear devices for all optical nonlinear processing of complex telecommunication signals. We discuss some recent developments achieved by our research group, through extensive collaborations with ...
Cosimo Lacava, Mohamed A. Ettabib, Periklis Petropoulos   +2 more
doaj   +1 more source

Coordinated control of active disturbance rejection and grid voltage feedforward for grid‐connected inverters

IET Power Electronics, EarlyView., 2022
This paper introduces the research on the inductance‐capacitor‐capacitor‐inductance grid‐connected inverter using active disturbance rejection and grid voltage feedforward coordinated control technology. The pade approximation is performed on the inductance‐capacitor‐capacitor‐inductance filter to derive the first‐order discretization mathematical ...
Guang‐Xin Zhong, Zhiteng Wang, Jiahua Zhou, Jian Li, Qingyu Su   +4 more
wiley   +1 more source

Reconfigurable Photonic Generation of Binary Modulated Microwave Signals

IEEE Photonics Journal, 2020
A novel photonic scheme of binary modulated microwave signals generation based on a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator is proposed and experimentally demonstrated.
Jialin Ma, Aijun Wen, Zhaoyang Tu, Xiangjuan Cheng, Yong Wang   +4 more
doaj   +1 more source

Investigation of a novel structure for 6PolSK-QPSK modulation

EURASIP Journal on Wireless Communications and Networking, 2017
Benefiting from the high spectrum efficiency and power efficiency, 6PolSK-QPSK (6-ary polarization-shift keying quadrature phase-shift keying) is a promising modulation format in coherent optical communication.
Yupeng Li, Ming Li, Jiawei Han, Tingting Han   +3 more
doaj   +1 more source

Dual-Determination of Modulation Types and Signal-to-Noise Ratios Using 2D-ASIQH Features for Next Generation of Wireless Communication Systems

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, Mohd Fadzli Mohd Salleh, Mohd Nazri Mahmud, Ismail Rakip Karas, Nor Shahida Mohd Shah, Samir Ahmed Al-Gailani   +5 more
doaj   +1 more source

All-Optical Regeneration and Format Conversion for 4APSK Signals Based on Nonlinear Effects in HNLF

IEEE Photonics Journal, 2023
An all-optical format conversion and regeneration scheme about 4-ary amplitude and phase shift keying (4APSK) signals is proposed and numerically simulated based on nonlinear effects in the high nonlinear fiber (HNLF).
Qiankun Li, Huashun Wen, Jiali Yang, Qi Xu, Xiongwei Yang, Yameng Li   +5 more
doaj   +1 more source

Performance Comparison between DPSK and OQPSK modulation approaches in multi environments channels with Matlab Simulink models

Wasit Journal of Engineering Sciences, 2019
Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where ...
Fatima faydhe Al- Azzawi, Faeza Abas Abid, Zainab faydhe Al-Azzawi   +2 more
doaj   +1 more source

Single-phase binary phase-shift keying, quadrature phase shift keying demodulators using an XOR gate as a phase detector

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
openaire   +1 more source