Adaptive Spectrum Sensing for Time-Varying Channels in Cognitive Radios

Author

Hao He ; Li, Geoffrey Ye ; Li, Sinan

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

2

Issue

2

fYear

2013

fDate

Apr-13

Firstpage

1

Lastpage

4

Abstract

In this article, we develop a novel adaptive spectrum sensing scheme to improve the throughput of cognitive radio (CR) users. The new scheme takes the variation of wireless channels into consideration and requires no priori knowledge of primary user activity statistics. At the beginning of each time frame, this adaptive sensing scheme adjusts the spectrum sensing parameters according to the latest sensing results and channel state information (CSI) of the time-varying channels. Numerical results show that the proposed adaptive spectrum sensing scheme can significantly outperform the traditional spectrum sensing scheme.

Keywords

cognitive radio; radio spectrum management; time-varying channels; wireless channels; CR; CSI; adaptive spectrum sensing scheme; channel state information; cognitive radio; spectrum sensing parameter; time-varying channel; wireless channel; Cognitive radio; Sensors; Signal to noise ratio; Throughput; Time-varying channels; Wireless sensor networks; Cognitive radio; spectrum sensing; time-varying channel;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2013.012513.120810

Filename

6425373