Dual-Chirp-Based Photonic THz-ISAC System with Adaptive Frequency Synchronization
Optics Letters 2024
Zhidong Lyu, Lu Zhang, Zuomin Yang, Qiuzhuo Deng, Xing Fang, Changming Zhang, Oskars Ozoliņš, Xiaodan Pang, Xianbin Yu

Recent advancements have brought significant attention to photonic terahertz (THz)-integrated sensing and communication (ISAC) systems. In this work, we present an adaptive frequency offset (FO) compensation method for dual-chirp-based ISAC waveforms, using the fractional Fourier transform (FrFT) method. The proposed scheme can enable frequency synchronization without a need for training preambles and exhibit robustness against system noise. We validate this approach through an experimental demonstration in a 300 GHz photonic THz-ISAC system with 20 Gbps quadrature-phase shift keying (QPSK) data transmission and 1.5 cm range resolution. The experiment successfully compensates for frequency offsets ranging from −5 to 5 GHz, achieving an estimation error of less than 0.08% and a chirp-pilot power overhead of 0.5%.


Keywords
Data mining; Frequency allocation; Frequency estimation
DOI
10.1364/OL.530911
Hyperlink
https://opg.optica.org/ol/abstract.cfm?uri=ol-49-16-4493

Lyu, Z., Zhang, L., Yang, Z., Deng, Q., Fang, X., Zhang, C., Ozoliņš, O., Pang, X., Yu, X. Dual-Chirp-Based Photonic THz-ISAC System with Adaptive Frequency Synchronization. Optics Letters, 2024, Vol. 49, No. 16, pp.4493-4496. ISSN 0146-9592. e-ISSN 1539-4794. Available from: doi:10.1364/OL.530911

Publication language
English (en)
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