期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 38, 期 12, 页码 3076-3088出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.2993021
关键词
Cognitive radio; Sensors; Microwave photonics; Radio frequency; Bandwidth; Cognitive radio; microwave photonics; spectrum sensing; waveform generation; self-interference cancellation; radar imaging
资金
- National Natural Science Foundation of China [61971222]
- Jiangsu Provincial Program for High-level Talents in Six Areas [DZXX-030]
- Fundamental Research Funds for Central Universities [NE2017002, NC2018005]
Cognitive radio is considered as a possible disruptive force to improve the spectral resource efficiency through sensing and interacting with the environment. Traditional electrical technologies to implement the cognitive radio face challenges in terms of bandwidth, resolution, and speed. In this paper, the concept and architecture of broadband cognitive radio systems enabled by photonics are proposed. Key microwave photonic techniques for the architecture are reviewed, including the photonics-based spectrum sensing, the photonic arbitrary waveform generation, the photonics-based self-interference cancellation processing, and the microwave photonic dechirp processing and radar imaging. A preliminary demonstration of a cognitive radar system enabled by photonics is performed. The future possible research directions on this topic are discussed.
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