Realtime GHz-Wide Spectrum Sensing and Acquisition Using the Sparse FFT

一种能够实时、廉价和低功耗测量的ghz宽无线电频谱传感设备将被制造出来。硬件将建立在稀疏傅里叶变换领域的最新进展之上，该领域表明，人们可以捕获稀疏信号的频率表示，而无需以奈奎斯特速率采样。可行性研究的初步结果表明，使用一些类似于廉价Wi-Fi卡中使用的低速低功耗模数转换器，可以恢复GHz的带宽。该研究可实现高效的频谱利用和可扩展的频谱监测，从而帮助政府管理这一重要资源。此外，实时GHz频谱传感可以帮助检测雷达信号，这是现有技术难以检测到的。这将开放大量频谱供共享，从而刺激移动和无线领域的创新。

A GHz-wide radio spectrum sensing device capable of real-time, cheap, and low-power measurements will be made. The hardware will build on recent advances in the area of sparse Fourier transforms, which show that one can capture the frequency representation of a sparse signal without sampling it at the Nyquist rate. Preliminary results from a feasibility study show it is possible to recover GHz of bandwidth using a few low-speed low-power analog-to-digital converters similar to those used in inexpensive Wi-Fi cards.The research enables efficient spectrum utilization and scalable spectrum monitoring, and hence can help the government in managing this important resource. Further, realtime GHz spectrum sensing can help detecting radar signals, which are hard to detect using existing technologies. This could open up large swaths of spectrum for sharing, which would stimulate innovations in the mobile and wireless domain.