2023-10-26 カリフォルニア大学サンディエゴ校(UCSD)
Crescendo displays periods of low and high activity across wireless frequency bands using a color spectrum. In the graph on the computer screen, the X axis represents frequency and the Y axis represents time. Photo by Areli Alvarez/QI.
◆このデバイスは、無線信号の干渉を排除し、利用されていない周波数帯域を探索し、低トラフィック期間においてリーズナブルなコストでワイヤレスアクセスを提供するためのプロトタイプ技術を開発しました。
◆広帯域スペクトラム内の周波数帯域の活動をリアルタイムでスキャンし、信号干渉に適応する能力を備え、高い信号の品質を確保します。これにより、無線ネットワークのコスト効率の向上と信頼性の向上が期待されます。
＜関連情報＞
- https://today.ucsd.edu/story/novel-device-from-uc-san-diego-researchers-promotes-efficient-real-time-and-secure-wireless-access
- https://dl.acm.org/doi/10.1145/3570361.3613294
クレッシェンド： 広帯域、リアルタイム、高忠実度のスペクトラム・センシング・システムに向けて Crescendo: Towards Wideband, Real-time, High-Fidelity Spectrum Sensing Systems
Raghav Subbaraman,Kevin Mills,Aaron Schulman,Dinesh Bharadia
ACM MobiCom ’23: Proceedings of the 29th Annual International Conference on Mobile Computing and Networking October 2023
DOI:https://doi.org/10.1145/3570361.3613294
ABSTRACT
Spectrum sensing systems provide real-time feedback essential for spectrum sharing. However, the growth of spectrum sharing is limited by the capabilities of these spectrum sensors. Sharing a new frequency band is only possible if sensors can detect activity in that band with sufficient time granularity and signal fidelity to meet spectrum sharing policy requirements. In this work, we introduce Crescendo, a system design that shows we can achieve wideband, real-time, high-fidelity spectrum sensing using sweeping spectrum sensors. We first provide an analysis that demonstrates there are operating points of sweeping sensors that can sense multiple popular protocols. Then we demonstrate these sensors can be built in practice with an adaptive gain super-heterodyne RF frontend with high-fidelity LO generation, and evaluate a prototype built with COTS components. In our benchmarks, Crescendo outperforms prior wideband spectrum sensors, achieving a 30 dB increase in dynamic range and 10 dB increase in SNR.
