DFT-Based OFDMA System with Phase Modulation for Broadband Communication
American Journal of Electrical and Computer Engineering
Volume 3, Issue 1, June 2019, Pages: 1-9
Received: Apr. 10, 2019; Accepted: May 20, 2019; Published: Jun. 13, 2019
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Farouk Abduh Kamil Al-Fuhaidy, Department of Electrical Engineering, Ibb University, Ibb, Yemen
Faisal Saif Alkamali, Department of Electrical Engineering, Ibb University, Ibb, Yemen
Khaled Abdullah Al-Soufy, Department of Electrical Engineering, Ibb University, Ibb, Yemen
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This paper proposes, a DFT-based OFDMA with phase modulation (DFT-OFDMA-PM) system. One main advantage of the phase modulated system is the constant envelope (CE) resulted signal, i.e, 0 dB PAPR, the second advantage is the ability to improve the diversity of multipath channels. These advantages have been exploited in the proposed system of this paper. The performance of the proposed system in terms of the bit error rate (BER) is studied and investigated and compared to the previously proposed DCT-OFDMA-PM system and the conventional OFDMA system without PM via computer simulation. The key parameter that affects the performance of the PM systems, the modulation index, is also studied and the optimum value is selected using exhaustive simulation scenarios. Moreover, the PAPR is also simulated for the proposed system and compared to the conventional system. Simulation results show the significant improvement of the proposed system in terms of PAPR and BER when compared to the conventional system. The simulation results for the proposed system show the effectiveness of the proposed system for wireless broadband communications.
DFT, DCT, OFDMA, PAPR, Phase Modulation
To cite this article
Farouk Abduh Kamil Al-Fuhaidy, Faisal Saif Alkamali, Khaled Abdullah Al-Soufy, DFT-Based OFDMA System with Phase Modulation for Broadband Communication, American Journal of Electrical and Computer Engineering. Vol. 3, No. 1, 2019, pp. 1-9. doi: 10.11648/j.ajece.20190301.11
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