Results 71 to 80 of about 102,128 (193)

Performance Analysis of OFDM under AWGN and Rayleigh Fading Channels Based on Software Defined Radio

Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems)
Orthogonal Frequency Division Multiplexing (OFDM) is a very efficient and popular modulation technique in modern wireless communication systems. OFDM offers advantages in terms of spectrum efficiency, resistance to multi-path interference, and is able to
Ivana Arum Dimarsasi, Rachmad Saptono, Muhammad Syirajjudin   +2 more
doaj   +1 more source

PAPR Reduction and Data Security Improvement for OFDM Technique Using Chaos System

Journal of Communications Software and Systems, 2019
Orthogonal Frequency Division Multiplexing (OFDM) is the most popular multicarrier technique because it produces several advantages such as higher spectral efficiency, high transmission rate, robustness to fading channel and etc..
Muntadher Kadhim Abdullah, Ali Jawad Ibada   +1 more
doaj  

Active and passive sensors for diagnostics quasi-zenith ionospheric HF communication channels

Физика волновых процессов и радиотехнические системы
Background. There is a growing need for active sensory diagnostics of partial HF channels to provide frequency support to quasi-zenith HF radio links in varying signal propagation conditions.
Dmitry V. Ivanov, Vladimir A. Ivanov, Natalia V. Ryabova, Alexey A. Elsukov   +3 more
doaj   +1 more source

Efficiency Comparison of DFT/IDFT Algorithms by Evaluating Diverse Hardware Implementations, Parallelization Prospects and Possible Improvements

Proceedings of the International Conference on Applied Innovations in IT, 2014
In this paper we investigate various algorithms for performing Fast Fourier Transformation (FFT)/Inverse Fast Fourier Transformation (IFFT), and proper techniques for maximizing the FFT/IFFT execution speed, such as pipelining or parallel processing, and
Danijela Efnusheva, Natasha Tagasovska, Aristotel Tentov, Marija Kalendar   +3 more
doaj   +1 more source

OFDMA para Sistemas de Banda Ancha Inalámbrica

Prisma Tecnológico, 2009
Este artículo describe el sistema de Acceso Múltiple por División de Frecuencia Ortogonal (OFDMA), un método de modulación para la segunda generación de acceso a banda ancha inalámbrica.
Daniel Tuñón, Ramón Ortega
doaj  

A New Parametric DFT-Based OFDM Transceiver for Intrinsic Wireless Communication Encryption

Advances in Electrical and Computer Engineering
In this paper, we propose a parametric OFDM transceiver for wireless communication encryption. One of the major contributions of this work is the intrinsic encryption nature of the proposed system, since it is a completely new idea and philosophically ...
CHERGUI, L., BOUGUEZEL, S.
doaj   +1 more source

Development of Communication System between TPMS and Server using Combination of OFDM and Convolutional Code Technique Based on SDR

Jurnal Sisfokom
The Tire Pressure Monitoring System (TPMS) has evolved into an essential element of contemporary vehicles, playing a pivotal role in enhancing road safety and the overall driving experience.
Hendy Briantoro, Billy Montolalu, Ardiansyah Al Farouq   +2 more
doaj   +1 more source

Deep Learning Based Channel Estimation for UAVs: A Modified U-Net Approach

Advances in Electrical and Computer Engineering
A stable and reliable communication link is crucial for unmanned aerial vehicle (UAV) applications. Key challenges include the UAV's high mobility (10-100 km/h) and an unstable data link. Orthogonal frequency division multiplexing (OFDM) enables higher
GUPTA, C., YADAV, S. S.
doaj   +1 more source

SLM-based PAPR reduction for improved performance of DCO-OFDM LiFi using blind estimation for healthcare monitoring system. [PDF]

Sci Rep
Sharaf AA, Seleem H, Sarhan A, Ashour AS.   +3 more
europepmc   +1 more source

Joint block estimation and attention-based long short-term memory network for doppler shift mitigation in UWA communication systems. [PDF]

Sci Rep
Zeng Q, Guo T, Peng G, Huang J.
europepmc   +1 more source