Photonics-Aided THz Integrated Sensing and Communication System Based on a Subcarrier-Chirp Inter-Embedded Waveform

Photonics-Aided THz Integrated Sensing and Communication System Based on a Subcarrier-Chirp Inter-Embedded Waveform

The advancement of integrated sensing and communications (ISAC) technology into millimeter-wave and even terahertz (THz) bands will be crucial for the upcoming sixth-generation wireless access networks. Here, we propose and experimentally demonstrate a photonics-assisted THz ISAC system based on a t...

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Bibliographic Details
Main Authors: Junhao Zhang, Mingzheng Lei, Min Zhu, Qingzhi Zhou, Bingchang Hua, Yuancheng Cai, Hao Li, Jiao Zhang, Zhengyi Liang, Yang Li, Xingyu Chen, Junjie Ding, Qing Zhong, Sha Zhu, Jianjun Yu
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Open Journal of the Communications Society
Subjects:
D-band
THz
integrated sensing and communication (ISAC)
LFMCW
photonicsassisted
Online Access:https://ieeexplore.ieee.org/document/10904178/
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Summary:The advancement of integrated sensing and communications (ISAC) technology into millimeter-wave and even terahertz (THz) bands will be crucial for the upcoming sixth-generation wireless access networks. Here, we propose and experimentally demonstrate a photonics-assisted THz ISAC system based on a time-frequency efficient dual-function waveform. The key to designing the ISAC waveform is embedding the subcarrier communication signals in the idle time-frequency dimension of a linear frequency-modulated continuous wave (LFMCW). This subcarrier-chirp inter-embedded (SCIE) method makes full use of the idle time-frequency resources of the LFMCW without compromising its large timebandwidth product, thereby significantly enhancing the time-frequency efficiency of the LFMCW. The experimental findings demonstrate that owing to the novel and simple communication embedding, wireless transmission of an 88-Gbps data rate over a distance of 10.2 m in the 150-GHz band is successfully realized. Simultaneously, multi-user detection with an 8-mm ranging resolution is also realized. By fully utilizing the idle time-frequency resources of the LFMCW, a density of information-resolution quotient of up to 46.2 × 10-2 bit·s/m2 has been achieved. Furthermore, the proposed ISAC system exhibits good frequency tunability and flexible communication modulation formats.
ISSN:2644-125X

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