Results 101 to 110 of about 14,247 (230)

Increasing the symbol rate in QAM system using a new set of orthonormal basics functions

Journal of Electrical Systems and Information Technology, 2018
This paper proposes a new technique to increase the symbol rate in Quadrature Amplitude Modulation (QAM) using a new set of orthonormal functions. The proposed technique increases the rate of QAM symbols without increasing the bandwidth of the modulated ...
A.Y. Hassan
doaj   +1 more source

Unequal error protection scheme based hierarchical 16-QAM for 3-D video transmission [PDF]

, 2012
In this paper, an unequal error protection (UEP) scheme based on hierarchical quadrature amplitude modulation (HQAM) for three-dimensional (3-D) video transmission is proposed.
Alajel, Khalid Mohamed, Xiang, Wei, Wang, Yafeng   +2 more
core   +1 more source

Multibeam-based mmWave segmented beamforming array system for high efficiency and secure communication

Engineering Science and Technology, an International Journal
A new mmWave transmitter architecture with multibeam-based segmented beamforming arrays (SBAs) for high-efficiency and secure communication is proposed.
Seung-Won Oh, Woo-Hee Lim, Han Lim Lee
doaj   +1 more source

A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications

Journal of Electrical and Computer Engineering, 2012
VLSI implementation of a configurable power-efficient MIMO detector is proposed to support 4×4 spatial multiplexing and modulation from QPSK to 64-QAM.
Hsiao-Chi Wang, Tung-Lin Liu, Yuan-Wei Wu, Hsi-Pin Ma   +3 more
doaj   +1 more source

A comparative study of two blind FIR equalizers [PDF]

, 2004
The paper investigates blind finite-impulse-response (FIR) equalization schemes for quadrature amplitude modulation (QAM) signalling. We compare a bootstrap maximum a posteriori probability (MAP) equalizer with a recently introduced concurrent constant ...
Cook, T.B., Anderson, L.C., Chen, S.
core  

Adaptive WHT Aided QAM for Fading Channels Subjected to Impulsive Noise [PDF]

The Bit Error Rate (BER) expressions of Walsh-Hadamard Transform (WHT) aided Quadrature Amplitude Modulation (QAM) transmitted in impulsive noise environments are derived.
Choi, Byoungjo, Hanzo, Lajos
core  

PERANCANGAN SIMULATOR MODULASI DAN DEMODULASI 16 QAM DAN 64 QAM MENGGUNAKAN LABVIEW [PDF]

, 2015
ABSTRAKSI Dengan berkembangnya sistem komunikasi saat ini, mahasiswa dituntut untuk memahami, mempelajari dan mendalami mengenai teknik modulasi dan demodulasi digital.
FERIO DHEAPUTRO
core  

BER Modulación QAM [PDF]

, 2010
La figura muestra la BER teórica de una modulación QAM para un conjunto de relaciones Eb/Nohttps://laboratoriosvirtuales.upv.es/eslabon/berQAMLlinares Llopis, R. (2010). BER Modulación QAM.
Llinares Llopis, Raúl
core  

Performance study of rotated QAM system [PDF]

, 2019
Nowadays, Quadrature amplitude modulation (QAM) has been widely used in wireless communication systems. An improved version of QAM, ie., the rotated QAM has been recently proposed. This report covers conventional QAM and rotated QAM. Both of them require
Lu, Shijie
core  

On Performance of Integrated Satellite HAPS Ground Communication: Aerial IRS Node vs Terrestrial IRS Node

IEEE Open Journal of the Communications Society
With an objective of ubiquitous connectivity around the world with enhanced spectral efficiency, intelligent reflecting surfaces (IRS) integrated satellite-terrestrial communications is a topic of research interest specially in infrastructure-deficient ...
Parvez Shaik, Kamal Kishore Garg, Praveen Kumar Singya, Vimal Bhatia, Ondrej Krejcar, Mohamed-Slim Alouini   +5 more
doaj   +1 more source