Results 41 to 50 of about 3,552 (166)

Unified Model and Survey on Modulation Schemes for Next-Generation Automotive Radar Systems

open access: yesRemote Sensing
Commercial automotive radar systems for advanced driver assistance systems (ADASs) have relied on frequency-modulated continuous wave (FMCW) waveforms for years due to their low-cost hardware, simple signal processing, and established academic and ...
Moritz Kahlert   +4 more
doaj   +1 more source

Research on modified selected mapping technique for PAPR reduction and reception performance improvement in 8QAM-OFDM optical access systems

open access: yesJournal of the European Optical Society-Rapid Publications, 2017
Background Orthogonal frequency division multiplexing has been regarded as one of the promising technologies for the optical access systems application.
Yufeng Shao, Wenzhe Ma
doaj   +1 more source

Orthogonal frequency division multiplexing (OFDM) in photonic communications

open access: yes, 2010
OFDM has emerged as a promising modulation technique in long-haul and access optical networks because of a number of advantages: Scalable spectrum partitioning, good spectral efficiency, dispersion tolerance, and a natural suitability for software-defined transmission.
Freude, W.   +20 more
openaire   +1 more source

Метод прихованої передачі інформації в системах з Orthogonal frequency division multiplexing (OFDM) модуляцією

open access: yesНаука і техніка Повітряних Сил Збройних Сил України, 2021
У статті проаналізовано можливості використання сигналів з Orthogonal frequency division multiplexing (OFDM) модуляцією для організації скритного радіозв’язку в системах спеціального призначення. Побудовано та проаналізовано “образ” сигналу з OFDM модуляцією в псевдофазовому просторі.
openaire   +3 more sources

Channel estimation using neural network in Orthogonal Frequency Division Multiplexing-Interleave Division Multiple Access (OFDM-IDMA) system

open access: yes2014 International Telecommunications Symposium (ITS), 2014
In this paper, channel estimation based on neural network trained by Levenberg-Marquardt Algorithm is proposed to estimate the channel coefficients in Orthogonal Frequency Division Multiplexing-Interleave Division Multiple Access (OFDM-IDMA) systems. Conventional pilot based channel estimation algorithms like Minimum Mean Square Error (MMSE) and Least ...
TAŞPINAR, NECMİ, Simsir, Sakir
openaire   +3 more sources

Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel

open access: yesJournal of Electrical, Electronics and Informatics, 2019
Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation.
N. M. A. E. Dewi Wirastuti   +3 more
doaj   +1 more source

Software-Based Analysis of Multi User Orthogonal Frequency Division Multiplexing (OFDM)

open access: yesJurnal Jartel: Jurnal Jaringan Telekomunikasi, 2016
The application of OFDM technology is still not fully implemented in the Telecommunication Study Program at State Polytechnic of Malang. This is because the application of this technology is applied to hardware. However, this can be overcome by simulating the OFDM technology through software.
openaire   +2 more sources

Multicarrier Multiplexing Method for Very Wide Bandwidth Transmission

open access: yesEURASIP Journal on Wireless Communications and Networking, 2006
The multicarrier orthogonal code division multiplexing (MC-OCDM) introduced here has been designed for very wide bandwidth (VWB) point-to-point and point-to-multipoint transmission.
doaj  

Effects of Doppler-Division Multiplexing on OFDM Joint Sensing and Communication Systems

open access: yesIEEE Open Journal of Signal Processing
A promising waveform candidate for future joint sensing and communication systems is orthogonal frequency-division multiplexing (OFDM). For such systems, supporting multiple transmit antennas requires multiplexing methods for the generation of orthogonal
Oliver Lang   +3 more
doaj   +1 more source

APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications

open access: yesMATEC Web of Conferences, 2018
Combined with OFDM (Orthogonal Frequency Division Multiplexing), satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users.
Dai Tianfang
doaj   +1 more source

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