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.

中文翻译：

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光子学支持的宽带认知无线电


认知无线电被认为是一种可能的颠覆性力量，可以通过感知环境并与环境交互来提高频谱资源效率。实现认知无线电的传统电气技术面临带宽、分辨率和速度方面的挑战。本文提出了基于光子学的宽带认知无线电系统的概念和架构。回顾了该架构的关键微波光子技术，包括基于光子学的频谱传感、光子任意波形生成、基于光子学的自干扰消除处理以及微波光子去线性调频处理和雷达成像。对光子学支持的认知雷达系统进行了初步演示。讨论了该主题未来可能的研究方向。