Photonic generation of frequency agile LFM signals for ISAC systems

被引：0

作者：

Zhou, Yixiao ^{[1
]}

Zhao, Shanghong ^{[1
]}

Li, Xuan ^{[1
]}

Wang, Guodong ^{[1
]}

机构：

[1] Information and Navigation College, Air Force Engineering University, Xi’an,710077, China

来源：

Optical and Quantum Electronics | 2024年 / 56卷 / 12期

关键词：

Agile manufacturing systems - Chirp modulation - Delta sigma modulation - Light modulation - Microwave photonics - Optical communication - Optical signal processing - Photonic devices - Photonic integrated circuits - Signal modulation;

D O I：

10.1007/s11082-024-07751-3

中图分类号：

学科分类号：

摘要：

A compact photonic method to generate frequency agile linearly frequency modulated (LFM) signals is proposed demonstrated by experiment and simulation. A Mach–Zehnder modulator driven by an LFM waveform train and an electrical controlled optical tunable delay line driven by a coding sequence is employed. According to time–frequency linear relationship of LFM signals, the initial frequency of the generated signals can be shifted by adjusting the introduced time delay. Experiments are carried out to verify the feasibility of the proposed generator. Frequency agile LFM signals under 2FSK and 4FSK modulation with symbol rate of 4 and 8 Msps are successfully obtained. 0.15 m range resolution and 4 Mbps communication data rate are achieved with a 1–1.5 GHz driving LFM signal. This scheme features compact structure and excellent tunability, which are promising to find applications in anti-jamming ISAC systems.

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