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Browsing by Subject "OFDM"

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Ball’s-Based Adaptive Channel Estimation Scheme Using RLS Family-Types Algorithms

Al-Shuwaili, Ali; Dh. Hassib, Mustafa; M. Jamel, Thamer (2022-08-06)

The recovery of the transmitted signals, propagated through wireless communication channels, is a complicated process due to the distortion and interference impairments in such random channels. However, the channel effect ...
Design and Implementation of DWMT Transmission Systems using IIR Wavelet Filter Banks

Abdul-Jabbar, Jassim M.; AL-Taei, Zaid Z. Hameed (2013)

Multicarrier modulation using orthogonal frequency division multiplexing (OFDM) is often recognized as an efficient solution for wireless communications. However, waveform bases other than sinusoidal functions can similarly ...
Detection of Message Signal at Receiver by Spectral Efficiency Analysis in 5G

Raza, Muhammad Ali; Raza, Muhammad Hassan; Raza, Mohsin (2019-05-01)

In wireless communication networks, the main thing is to achieve high data rates and to minimize the noise. As compared to 4G which supports 100 Mbps the 5G supports 1 Gbps data rates. By using multiple users, NOMA can ...
Introduction to Special Issue on Intelligent Systems and Performance Evaluation

Bastaki, Eesa; Mahmoud, Magdi S.; El-Medany, Wael (2018-01-01)

The special issue of the International Journal of Computing and Digital Systems (IJCDS), focuses on intelligent systems and performance evaluation, and publishes selected papers from the 9 th IEEEGCC 2017 conference May ...
OFDM for Cognitive Radios: An overview Present Solutions and Future Directions

Begh,Gh. Rasool; Ajaz,Hussain Mir (2015)

Spectrum efficiency, high speed data transmission and security are the major requirements for new generation wireless communications. By integrating OFDM into physical layer of cognitive radio, we can achieve high speed ...
PAPR Reduction in VLC-OFDM System using CPM Combined with PTS Method

Freag, Haitham; Hassan, Emad S.; El-Dolil, Sami A.; Dessouky2, Moawad I. (2017-05-01)

One of the primary issues influencing the execution of visible light communication (VLC) system was high peak to average power ratio (PAPR), which depended on the orthogonal frequency division multiplexing (OFDM) technology. ...
Performance Evaluation of OFDM Based Watermarking Robust to Multipath Spatial Shifts

Pulayikodi, Suja Kalarikkal; Tarhuni, Naser; Ahmed, Afaq; Shiginah, Fahad Bait (2018-01-01)

A digital watermark is a visible or invisible pattern embedded in a digital image which can be used for copyright protection, authentication, broadcast monitoring, telemedicine and many more. This paper describes how an ...
A Proposed Sub-optimal Power Allocation using Simulated Annealing in Cognitive Radio Networks

Dawoud,Abd Elhamed M.; Shokair, Mona; Elkordy, Mohamed; ElHalafawy, Said (2016)

Due to the rapid demand for wireless services and the increase in the wireless device count, there is a lack of available spectrum bands which constrain the further development of wireless communication .Therefore, Cognitive ...
Reduction of Out of Band Radiation Using Modified Constellation Expansion in OFDM based Cognitive Radios

Malik, Mohammad Abas; Begh, G. R.; Mir, A.H. (2016)

Out of band radiation (OOBR) is one of the major problems in OFDM based Cognitive Radios. In the spectrum sharing scenario, OOBR generates appreciable interference to the primary user, even if its spectrum band is not used. ...

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