DFT-Based OFDMA System with Phase Modulation for Broadband Communication

Al-fuhaidy, Farouk; Al-Kamali, Faisal S.; Al-Soufy, Khaled Abdullah

doi:10.11648/j.ajece.20190301.11

Cited by 4 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many efforts have been done to propose variant OFDMA schemes to improve PAPR, like the DST and the DCT as compared to the conventional Discrete Fourier Transform (DFT) system. Moreover, many PAPR mitigation techniques and CFOs estimation methods are presented [5,[7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Secure Image Transmission through LTE Wireless Communications Systems

Al-Fahaidy

Bouthigy

Al-Shamri

et al. 2023

Preprint

View full text Add to dashboard Cite

Secure transmission of images over wireless communications systems can be done using RSA, the most known and efficient cryptographic algorithm, and OFDMA, the most preferred signal processing choice in wireless communications. This paper aims to study and investigate the performance of OFDMA system for wireless transmission of RSA-based encrypted images. In fact, the performance of OFDMA systems, based on different signals processing techniques such as, discrete sine transforms (DST) and discrete cosine transforms (DCT), as well as the conventional discrete Fourier transforms (DFT) are tested for wireless transmission of gray scale images with/without RSA encryption. The progress of transmitting the image is carried by firstly, encrypting the image with RSA algorithm, then, the encrypted image is modulated with DFT-based, DCT-based, and DST-based OFDMA systems. After that, the modulated images are transmitted over a wireless multi-path fading channel. The reverse operations will be carried at the receiver, in addition to the frequency domain equalization to overcome the channel effect. Exhaustive numbers of scenarios are performed for study and investigation of the performance of the different OFDMA systems in terms of PSNR and MSE, with different subcarriers mapping and modulation techniques, is done. The obtained results indicate the ability of different OFDMA systems for wireless secure transmission of images. However, the DCT-OFDMA system has shown its superiority over the DST-OFDMA system and the conventional DFT-OFDMA system.

show abstract

Section: Introductionmentioning

confidence: 99%

Secure Image Transmission through LTE Wireless Communications Systems

Al-Fahaidy

Bouthigy

Al-Shamri

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Secure image transmission through LTE wireless communications systems

Al-Fahaidy,

AL-Bouthigy,

Al-Shamri

et al. 2024

J Image Video Proc.

View full text Add to dashboard Cite

Secure transmission of images over wireless communications systems can be done using RSA, the most known and efficient cryptographic algorithm, and OFDMA, the most preferred signal processing choice in wireless communications. This paper aims to investigate the performance of OFDMA system for wireless transmission of RSA-based encrypted images. In fact, the performance of OFDMA systems; based on different signal processing techniques, such as, discrete sine transforms (DST) and discrete cosine transforms (DCT), as well as the conventional discrete Fourier transforms (DFT) are tested for wireless transmission of gray-scale images with/without RSA encryption. The progress of transmitting the image is carried by firstly, encrypting the image with RSA algorithm. Then, the encrypted image is modulated with DFT-based, DCT-based, and DST-based OFDMA systems. After that, the modulated images are transmitted over a wireless multipath fading channel. The reverse operations will be carried at the receiver, in addition to the frequency domain equalization to overcome the channel effect. Exhaustive numbers of scenarios are performed for study and investigation of the performance of the different OFDMA systems in terms of PSNR and MSE, with different subcarriers mapping and modulation techniques, is done. Results indicate that the ability of different OFDMA systems for wireless secure transmission of images. However, the DCT-OFDMA system showed superiority over the DST-OFDMA and the conventional DFT-OFDMA systems.

show abstract

Voltage Control in Distribution Networks in Presence of Distributed Generators Based on Local and Coordinated Control Structures

Dashtdar

2019

The Scientific Bulletin of Electrical Engineering Faculty

View full text Add to dashboard Cite

Nowadays, many factors lead to selection and utilization of distributed generations (DG) in distributed networks. But more penetration of DG's in network faced with problem due to existence of passive and inactive distribution networks. One of these essential issues is voltage rise due to injection of active power generated by DG's. That in this paper, control strategies for controlling of voltage profile of distribution network and adjustment of increase of DG's penetration is assessed and an optimal strategy for voltage rise with mathematical formulation is presented that will include both local and coordinated control approaches of reactive power generation. Finally, in this paper an implementation plan with smart control tools of DG's is suggested.

show abstract

DFT-Based OFDMA System with Phase Modulation for Broadband Communication

Cited by 4 publications

References 9 publications

Secure Image Transmission through LTE Wireless Communications Systems

Secure Image Transmission through LTE Wireless Communications Systems

Secure image transmission through LTE wireless communications systems

Voltage Control in Distribution Networks in Presence of Distributed Generators Based on Local and Coordinated Control Structures

Contact Info

Product

Resources

About