Photonics-aided 0.3-THz wireless transmission based on digital sub-carrier multiplexing

Weiliang Xu; Min Zhu; Jiao Zhang; Guo Zhao; Zhitian Cheng

doi:10.1117/12.2619891

26 July 2022 Photonics-aided 0.3-THz wireless transmission based on digital sub-carrier multiplexing

Weiliang Xu, Min Zhu, Jiao Zhang, Guo Zhao, Zhitian Cheng

Proceedings Volume 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing; 122780N (2022) https://doi.org/10.1117/12.2619891
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

To combine the merits of fiber communication and wireless communication, photonics-aided terahertz-wave (THz-wave) technology has become a popular technology in recent years. In this paper, a 92 Gbit/s photonics-aided 0.3-THz wireless transmission system based on digital sub-carrier multiplexing (DSCM) is proposed and simulated. In order to compensate the phase noise, both Viterbi-Viterbi and maximum likelihood (VV&ML) algorithm and decision directed digital phase lock loop (DD-PLL) method are considered and compared. According to the simulation results, DSCM based scheme can provide better performance than single carrier (SC) based scheme in the case of low received optical power (ROP) or input optical power (IOP) while there is no advantage in the case of high ROP or IOP. For SC based scheme, DD-PLL has 1 dB sensitivity gain compared with VV&ML when BER drops from 10^-3 to 10^-4, while 2 dB sensitivity gain was obtained for DSCM based scheme for ROP. For SCM based scheme, DD-PLL has 1 dB sensitivity gain compared with VV&ML when BER drops from 10^-3 to 10^-4. On the whole, DD-PLL outperforms VV&ML in terms of performance in high ROP case for both SC and SCM based scheme. Besides, DD-PLL has lower computation complexity than VV&ML.

Citation Download Citation

Weiliang Xu, Min Zhu, Jiao Zhang, Guo Zhao, and Zhitian Cheng "Photonics-aided 0.3-THz wireless transmission based on digital sub-carrier multiplexing", Proc. SPIE 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 122780N (26 July 2022); https://doi.org/10.1117/12.2619891

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KEYWORDS

Multiplexing

Phase shift keying

Digital signal processing

Modulation

Terahertz radiation

Computer simulations

Optical communications

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