Results 41 to 50 of about 10,809 (212)

Uncertainty Characterization Framework for Machine Learning Based ACM in Q‐Band Satellite Links

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Adaptive coding and modulation (ACM) is a widely utilized technique in satellite communication networks to mitigate the adverse effects of rain fades, particularly in extremely high frequency (EHF) bands. As a core component of fade mitigation techniques (FMTs), ACM improves signal resilience.
Kamolideen Abolarinwa, Kufre‐Mfon Ekerete, Ali Roula, Ifiok Otung   +3 more
wiley   +1 more source

Performance Evaluation of a Standalone OFDM System for Digital Image Transmission over AWGN Channels

Journal of Innovation Information Technology and Application
This study investigates the performance of a standalone digital communication system based on Orthogonal Frequency Division Multiplexing (OFDM) for digital image transmission over Additive White Gaussian Noise (AWGN) channels. The system was tested using
Ade silvia handayani, Sarjana, Aryanti, Nurhajar Anugraha, Muhammad Hanif Fatin, Devi Wahyuni, Muhammad Rafly Wijaya, Dely Andini   +7 more
doaj   +1 more source

CLEAR Interference Cancellation in a Wideband Dual‐Channel Receiver for Independent Satellite Multi‐Connectivity Links

International Journal of Satellite Communications and Networking, Volume 44, Issue 6, Page 689-699, November/December 2026.
ABSTRACT In this paper, the correlation learning estimation and adaptive reduction (CLEAR) of interference, an adaptive, blind and transparent interference compensation method applied in a wideband dual‐channel receiver, is studied for a pair of independent satellite multi‐connectivity links, using the same carrier frequency and signal bandwidth in use
Svilen Dimitrov
wiley   +1 more source

Optical coherent DP-QPSK receiver unit.

, 2022
Optical coherent DP-QPSK receiver unit.
Lunchakorn Wuttisittikulkij (9707288), Demostenes Zegarra Rodriguez (11707659), Jamel Nebhen (11603976), Santosh Kumar (106550), Abhishek Sharma (144862), Sushank Chaudhary (11707650)   +5 more
core   +1 more source

Breaking Optical Transparency and Electromagnetic Performance Trade‐Offs for Transparent Reflective Metasurfaces

Advanced Optical Materials, Volume 14, Issue 40, 27 October 2026.
A theory‐guided magnetoelectric metasurface design breaks the conventional optical transparency and electromagnetic performance trade‐offs. By preserving the electric and magnetic current paths required for efficient reflection through fine‐metal‐line structure, the developed transparent reflective metasurface achieves high optical transparency without
Mina Feizi, Shu‐Lin Chen, Geng‐Bo Wu, Li‐Zhao Song, Pei‐Yuan Qin, Y. Jay Guo   +5 more
wiley   +1 more source

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  

A Novel Sample Based Quadrature Phase Shift Keying Demodulator

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, Sawal Hamid Md Ali   +1 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

A Machine Learning Approach for Signal Detection Using Rational Function Curve Fitting in Slow Flat Fading MIMO Communications

Engineering Reports, Volume 8, Issue 10, October 2026.
In this manuscript, we propose a new scheme for signal detection in MIMO communication, based on curve fitting (CF) and supervised machine learning, which classifies received signals without emphasis and without needing to know the signal constellation, modulation system, channel estimation, and transmitter‐receiver structure of an Nt × Nr MIMO ...
Hamid Nourollahi, S. Abolfazl Hosseini, Ali Shahzadi   +2 more
wiley   +1 more source

All-optical format conversion from RZ-QPSK to NRZ-QPSK

Frontiers of Optoelectronics, 2012
We proposed and demonstrated an all-optical format conversion from return-to-zero quadrature phase shift keying (RZ-QPSK) to non-return-to-zero QPSK (NRZ-QPSK) at 40 Gb/s using a half bit delay interferometer (DI). Due to the constructive interference in the DI, the format conversion was achieved with the phase information preserved.
Bingrong Zou, Yu Yu, Wenhan Wu, Shoujin Hu, Zheng Zhang, Xinliang Zhang   +5 more
openaire   +1 more source