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arXiv · 2508.01291

Impacts of Phase Noise on M-ary QAM THz Wireless Communications

Bowen Liu·Takasumi Tanabe
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Abstract

THz technology is positioned as a key enabler for next-generation wireless links due to the extensive untapped bandwidth and inherent compatibility with silicon photonics. Here, the phase noise of THz sources is modeled to characterized its impacts on a QAM-based wireless communication system. Particularly, common and instantaneous phase errors are unveiled and presented via constellation diagrams. In addition, tolerance of phase noise under different M-ary modulation formats is explored. Meanwhile, a linear correlation between instantaneous component and EVM is revealed to define the error-free boundary, where microcomb-driven scheme is highlighted as a highly promising candidate for error-resilient THz links under advanced M-QAM formats. The results intuitively illustrate the impacts of phase noise and offer practical insights for refining technical details on physical-layer protocols.

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Bowen Liu, Takasumi Tanabe. 2025-08-02. Impacts of Phase Noise on M-ary QAM THz Wireless Communications. https://arxiv.org/abs/2508.01291

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