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Carrierless Amplitude and Phase Modulation for Terahertz Communications

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posted on 2022-07-22, 20:54 authored by Mohamed ShehataMohamed Shehata, Ke (Desmond) Wang, Withawat WithayachumnankulWithawat Withayachumnankul

Terahertz communications has been foreseen as a key enabler to the sixth generation  (6G) of wireless communications systems. However, the design of spectrally-efficient waveforms and modulation schemes is an ongoing challenge in this regime. In this paper, we propose and experimentally demonstrate the transmission of M-ary carrierless amplitude and phase (CAP) modulated signals using a 253 GHz photo-mixing-based terahertz wireless communications system combined with the optical transmission over a 10-km standard single mode fiber (SSMF). Experimental results show that the CAP modulation technique has a capability to support the high-speed transmission of terahertz signals over a wide range of data rates from 4 Gbit/s to 96 Gbit/s based solely on optical intensity modulation at the transmitter side and terahertz envelope detection at the receiver side. Consequently, M-ary CAP can potentially be adopted as a low-complexity waveform and modulation contender to simplify the transceivers architectures for the sixth generation (6G) terahertz communications systems, without sacrificing the high throughput targeted by these systems.


Australian Research Council Discovery Project (No. ARC DP180103561)

The Australian Government through the Australian Government Research Training Program Scholarship

The University of Adelaide through the Adelaide Scholarship International

The SmartSAT Cooperative Research Center (Project No.: P1-14s)


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Submitting Author's Institution

The University of Adelaide

Submitting Author's Country

  • Australia