Name
Title | ||
|---|---|---|
QuickSense: Fast and energy-efficient channel sensing for dynamic spectrum access networks |
Abstract | ||
|---|---|---|
Spectrum sensing, the task of discovering spectrum usage at a given location, is a fundamental problem in dynamic spectrum access networks. While sensing in narrow spectrum bands is well studied in previous work, wideband spectrum sensing is challenging since a wideband radio is generally too expensive and power consuming for mobile devices. Sequential scan, on the other hand, can be very slow if the wide spectrum band contains many narrow channels. In this paper, we propose an analog-filter based spectrum sensing technique, which is much faster than sequential scan and much cheaper than using a wideband radio. The key insight is that, if the sum of energy on a contiguous band is low, we can conclude that all channels in this band are clear with just one measurement. Based on this insight, we design an intelligent search algorithm to minimize the number of total measurements. We prove that the algorithm has the same asymptotic complexity as compressed sensing while our design is much simpler and easily implementable in the real hardware. We show the availability of our technique using hardware devices that include analog filters and analog energy detectors. Our extensive evaluation using real TV “white space” signals shows the effectiveness of our technique. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/INFCOM.2013.6567028 | INFOCOM |
Keywords | Field | DocType |
mobile devices,mobile handsets,energy-efficient channel sensing,wideband spectrum sensing,power consumption,hardware devices,narrow spectrum bands,intelligent search algorithm,broadband networks,radio spectrum management,analog filters,dynamic spectrum access networks,analog energy detectors,wireless channels,compressed sensing,wideband radio,tv white space signal,subscriber loops,spectrum sensing,asymptotic complexity,detectors,noise measurement,hardware,algorithm design and analysis,bandwidth,noise | Wideband,White spaces,Algorithm design,Search algorithm,Computer science,Full table scan,Computer network,Bandwidth (signal processing),Detector,Compressed sensing | Conference |
ISSN | ISBN | Citations |
0743-166X | 978-1-4673-5944-3 | 14 |
PageRank | References | Authors |
0.73 | 6 | 6 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Sungro Yoon | 1 | 67 | 3.98 |
| Erran Li | 2 | 4416 | 311.59 |
| Soung Chang Liew | 3 | 3307 | 237.57 |
| Romit Roy Choudhury | 4 | 3951 | 233.31 |
| Injong Rhee | 5 | 3828 | 212.39 |
| Kun Tan | 6 | 1350 | 98.64 |