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Carrierless Amplitude and Phase Modulation for Terahertz Communications
  • Mohamed Shehata ,
  • Ke (Desmond) Wang ,
  • Withawat Withayachumnankul
Mohamed Shehata
The University of Adelaide

Corresponding Author:[email protected]

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Ke (Desmond) Wang
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Withawat Withayachumnankul
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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.
Sep 2023Published in IEEE Journal of Selected Topics in Quantum Electronics volume 29 issue 5: Terahertz Photonics on pages 1-14. 10.1109/JSTQE.2023.3316886