Results 101 to 110 of about 51,738 (210)

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

Adaptive Modulation (QPSK, QAM)

, 2013
In this paper, introduced below are the concepts of digital modulation used in many communication systems today. Techniques described include quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) and how these techniques can be used to increase the capacity and speed of a wireless network.
openaire   +2 more sources

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

Linear Precoding for MIMO Channels with QAM Constellations and Reduced Complexity

, 2016
In this paper, the problem of designing a linear precoder for Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core  

Constellation design of 32-QAM by scaling two square 16-QAMs with dual-level coding

ICT Express
In this paper, we propose a 32-quadrature amplitude modulation (QAM) constellation to achieve high spectral efficiency, along with dual-level coding (DLC) and successive cancellation decoding (SCD).
Minhui Yu, Seunggi Choi, Hosung Park
doaj   +1 more source

Low-complexity Automatic Modulation Classification of Higher-order QAM Based on Square Modulus Extraction

JITCE (Journal of Information Technology and Computer Engineering)
Modulation classification plays a key role in decoding cognitive radio, signal identification, menace assessment, spectrum senses, and management, efficient use of available spectrum and increase in the speed of data transfer.
Olalekan Bello
doaj   +2 more sources

On the use of extrinsic probabilities in the computation of non-Bayesian Cramér–Rao bounds for coded linearly modulated signals [PDF]

, 2018
Moeneclaey, Marc, Noels, Nele
core   +2 more sources

An Open-Source QAM MODEM for Visible Light Communication in FPGA for Real-Time Applications. [PDF]

Sensors (Basel)
Ricci S.
europepmc   +1 more source

AI-Enhanced Hybrid QAM-PPM Visible Light Communication for Body Area Networks. [PDF]

Sensors (Basel)
Shrestha S, Taparugssanagorn A, Caputo S, Mucchi L.   +3 more
europepmc   +1 more source

Performance evaluation of pilot-assisted PAPR reduction technique in optical OFDM systems [PDF]

, 2015
Ogunkoya, Funmilayo B., Popoola, Wasiu O., Shahrabi, Ali, Sinanovic, Sinan   +3 more
core   +2 more sources