Real-time spectrum sensing is essential to enable dynamic and rapid spectrum sharing of unused frequencies to cater the substantial demands of new wireless services deploying the existing RF bands. In this paper, we present a novel, real-time spectrum sensing approach for widely used RF signals based on Brillouin-scattering-induced transparency (BIT). A temporal discrimination of multi-channel input frequencies is achieved through the group delay tuning by BIT. By tuning the pump power and frequency, the proposed technique is fully reconfigurable and viable for a broad range of spectrum sensing. Several experimental illustrations of the time domain sensing are presented for two-tone channels with 0.9, 1.8, and 5 GHz frequencies to detect the unused spectrum within 3G, 4G, and 5G signals.

中文翻译：

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布里渊散射诱导的透明度使射频信号的可重构感应成为可能

实时频谱感知对于启用未使用频率的动态和快速频谱共享以满足部署现有射频频段的新无线服务的大量需求至关重要。在本文中，我们提出了一种基于布里渊散射诱导透明度 (BIT) 的广泛使用的射频信号的新型实时频谱感知方法。通过 BIT 的群延迟调谐实现多通道输入频率的时间区分。通过调整泵浦功率和频率，所提出的技术是完全可重新配置的，并且适用于广泛的频谱感测。针对 0.9、1.8 和 5 GHz 频率的双音信道提供了时域感测的几个实验说明，以检测 3G、4G 和 5G 信号中未使用的频谱。