Testbed for Sub-Nyquist Wideband Spectrum Monitoring

Revista Ingenierías Universidad de Medellín

Juan Felipe Medina Lee¹  Duvier de Jesús Bohórquez Palacio¹  Alexander López-Parrado¹  Alexander Vera Tasamá¹ 

[1] Universidad del Quindío;

关键词: compressed sensing;    sampling methods;    information systems;    system-on-chip;    analog processing circuits;    web services;   

DOI  :  https://doi.org/10.22395/rium.v19n37a2

来源: DOAJ

【 摘 要 】

Radioelectric spectrum management is a concern for today’s world, mainly duetothemisusethathasbeengiventothisresourcethroughtheyears,especially on the UHF band. To address this problem, a testbed for sub-Nyquist Wideband Spectrum Monitoring was built, that includes a web interface to remotely measure occupancy of the UHF band.To achieve the above, an RF interface that allows tuning UHF frequencies with an instantaneous bandwidth of 95 MHz was built. Afterwards, a Random Demodulator was connected, and then an embedded system performed sub--Nyquist sampling and spectrum recovery. The embedded system connected to an information system that serves a web page, through which remote users can perform UHF band monitoring. Experimental results showed that spectrum sensing can be achieved by using different algorithms on certain sparse spectra. In addition, the aforementioned web interface allowed simultaneous user connections, in order to perform independent measurements by sharing a hardware subsystem

【 授权许可】

Unknown