Performance analysis of CE-OFDM Over terahertz bands
By: Ghzaoui, Mohammed EL
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Contributor(s): belkadid, Jamal.
Publisher: USA Springer 2023Edition: Vol.104(5), Oct.Description: 1147-1154p.Subject(s): Humanities and Applied SciencesOnline resources: Click here
In:
Journal of the institution of engineers (India): Series BSummary: Thanks to THz (terahertz) technologies, it is already possible to realize very high data rate in the order of multi-Gb/s for indoor wireless links. To benefit from the properties of THz system and exploit well this technology, transmission technique must be used. For that reason, we propose in this work a CE-OFDM (Constant Envelop Orthogonal Frequency Division Multiplexing) technique to be used for THz communication system in order to reduce the PAPR problem associate with OFDM modulation. In this paper, a CE-OFDM receiver with phase demodulation is suggested. To more improve the performance of the proposed system, a frequency and phase demodulation receiver for CE-OFDM system are presented. This technique allows a nonlinear class of Power amplifier, resulting in a better efficiency of power consumption, which is highly needed for THz applications because of their limited power resources. The channel transfer function of the proposed model in terahertz band is simulated. It shows that the proposed channel presents notches especially at some frequency as the case of f = 600 GHz, 710 GHz and 935GHz. A BER (Bit Error Rate) of less than 10–4 is obtained for MMSE equalizer with 2pih = 0.5 when the SNR is superior to 15dB. Moreover, the obtained results regarding BER revealed that the performance of the proposed technique is very sensitive to the variation of modulation index. It has been demonstrated by simulation that CE-OFDM modulation outperform OFDM over THz frequencies due to the presence of linear devices such as ADC and HPA. Consequently, CE-OFDM look better tailored to support THz applications.
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School of Engineering & Technology Archieval Section | Not for loan | 2024-0176 |
Thanks to THz (terahertz) technologies, it is already possible to realize very high data rate in the order of multi-Gb/s for indoor wireless links. To benefit from the properties of THz system and exploit well this technology, transmission technique must be used. For that reason, we propose in this work a CE-OFDM (Constant Envelop Orthogonal Frequency Division Multiplexing) technique to be used for THz communication system in order to reduce the PAPR problem associate with OFDM modulation. In this paper, a CE-OFDM receiver with phase demodulation is suggested. To more improve the performance of the proposed system, a frequency and phase demodulation receiver for CE-OFDM system are presented. This technique allows a nonlinear class of Power amplifier, resulting in a better efficiency of power consumption, which is highly needed for THz applications because of their limited power resources. The channel transfer function of the proposed model in terahertz band is simulated. It shows that the proposed channel presents notches especially at some frequency as the case of f = 600 GHz, 710 GHz and 935GHz. A BER (Bit Error Rate) of less than 10–4 is obtained for MMSE equalizer with 2pih = 0.5 when the SNR is superior to 15dB. Moreover, the obtained results regarding BER revealed that the performance of the proposed technique is very sensitive to the variation of modulation index. It has been demonstrated by simulation that CE-OFDM modulation outperform OFDM over THz frequencies due to the presence of linear devices such as ADC and HPA. Consequently, CE-OFDM look better tailored to support THz applications.
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