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Performance analysis of OFDM-Based VLC schemes in NLOS channels
(2020)
In this paper, several Orthogonal frequency division multiplexing (OFDM)-based Visible light Communications (VLC) techniques designed for intensity modulation/direct detection (IM/DD) are evaluated and compared for various ...
Multilayer extreme learning machine as equalizer in OFDM-based radio-over-fiber systems
(2021)
Mobile/wireless networks aim to support diverse services with numerous and sophisticated requirements, such as energy efficiency, spectral efficiency, negligible latency, robustness against time and frequency selective ...
Empirical path loss distribution for visible light communications in underground mines
(2020)
Visible light communication (VLC) systems allow communication and lighting simultaneously. This advantage presents VLC as an emerging technology to provide reliable communication in harsh environments, such as underground ...
Improved double-jump 2 pulse to compensate frequency offset in MQAM-OFDM systems
(2020)
Orthogonal frequency division multiplexing (OFDM) is severely affected by the frequency offset because of it causes inter-carrier interference (ICI). ICI can be diminished with the assistance of any pulse that complies the ...
ICI reduction by using the improved double-jump 1 pulse in MQAM-OFDM schemes
(2020)
Orthogonal frequency division multiplexing (OFDM) is sensitive to frequency offset since it causes inter-carrier interference (ICI). Frequency offset results from the receiver's crystal oscillator inaccuracy, Doppler spread, ...
Multiresolution speech enhancement based on proposed circular nested microphone array in combination with sub-band affine projection algorithm
(2020)
Speech enhancement is one of the most important fields in audio and speech signal processing. The speech enhancement methods are divided into the single and multi-channel algorithms. The multi-channel methods increase the ...
A VLC channel model for underground mining environments with scattering and shadowing
(2020)
Underground mining is an industry that preserves the miners' safety and efficiency in their work using wireless communication systems as a tool. In addition to communication links characterized by radio frequency signals, ...
Analysis of spectrum detection and decision using machine learning algorithms in cognitive mobile radio networks
(2021)
In this work, the performance of four Machine Learning Algorithms (MLAs) applied to Cognitive Mobile Radio Networks (CMRNs) are analyzed. These algorithms are Coalition Game Theory (CGT), Naive Bayesian Classifier (NBC), ...
Propagation features of visible light communication in underground mining environments
(2020)
Due to the problems that radio-frequency technology presents in hostile environments, especially in mining environments, other forms of more robust as well as efficient communication have been explored in recent years. ...
3D multiple sound source localization by proposed cuboids nested microphone array in combination with adaptive wavelet-based subband GEVD
(2020)
Sound source localization is one of the applicable areas in speech signal processing. The main challenge appears when the aim is a simultaneous multiple sound source localization from overlapped speech signals with an ...