A two-stage sensing technique for dynamic spectrum access

Author

Luo, Ling ; Neihart, Nathan M. ; Roy, Sumit ; Allstot, David J.

Author_Institution

Dept. of Electr. Eng., Univ. of Washington, Seattle, WA

Volume

8

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3028

Lastpage

3037

Abstract

Dynamic spectrum access (DSA) is a promising approach for the more effective use of existing spectrum. Of fundamental importance to DSA is the need for fast and reliable spectrum sensing over a wide bandwidth. A model for two-stage sensing is described based on an analysis of the mean time to detect an idle channel. Simulation results show that it provides significantly faster idle channel detection than conventional single-stage random searching. Several system-level issues are also investigated including the settling time of the phase-locked loop (PLL) in the frequency synthesizer, which determines the channel switching time. Effects of the bandwidth of the coarse sensing block and the integration duration of the energy detector are also presented.

Keywords

frequency synthesizers; phase locked loops; radio spectrum management; telecommunication switching; channel switching; coarse sensing block; dynamic spectrum access; energy detector; frequency synthesizer; phase-locked loop; single-stage random searching; spectrum sensing; two-stage sensing technique; Bandwidth; Detectors; Energy consumption; FCC; Frequency synthesizers; Phase locked loops; Protocols; TV broadcasting; Throughput; Wireless sensor networks; Dynamic spectrum access, two-stage sensing, PLL settling time, detection time, power consumption;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2009.080482

Filename

5089983