Optimized FFT and filter bank based spectrum sensing for Bluetooth signal

Author

Dikmese, Sener ; Renfors, Markku

Author_Institution

Dept. of Commun. Eng., Tampere Univ. of Technol., Tampere, Finland

fYear

2012

fDate

1-4 April 2012

Firstpage

792

Lastpage

797

Abstract

Wireless Local Area Networks (WLAN) and Wireless Personal Area Networks (WPAN) such as the Bluetooth are designed to operate in 2.4 GHz ISM band. Since both IEEE 802.15 based Bluetooth and IEEE 802.11 WLAN devices, among various others, use the same frequency band, interference may lead to significant performance degradation. Hence, Cognitive Radio (CR) technology has been considered for coordinating better the spectrum use in this band. Spectrum sensing is one of the most important functions in a CR. In this study, energy detector based spectrum sensing techniques are optimized for detecting Bluetooth signals, considering both the effect of non-flat power spectrum and frequency hopping characteristics. To reduce complexity and required number of samples for effective spectrum sensing, optimum weighting process is proposed for subband based spectrum sensing. Bluetooth sensing is analyzed also in the presence of WLANs at nearby frequencies.

Keywords

Bluetooth; channel bank filters; cognitive radio; fast Fourier transforms; frequency hop communication; radio spectrum management; radiofrequency interference; signal detection; wireless LAN; Bluetooth signal detection; CR technology; IEEE 802.11 WLAN device; IEEE 802.15 based Bluetooth; ISM band; WPAN; cognitive radio; energy detector based spectrum sensing; filter bank based spectrum sensing; frequency 2.4 GHz; frequency band; frequency hopping characteristics; interference; nonflat power spectrum; optimized FFT; optimum weighting process; performance degradation; spectrum use; subband based spectrum sensing; wireless local area network; wireless personal area network; Approximation methods; Bluetooth; OFDM; Sensors; Signal to noise ratio; Wireless LAN; Bluetooth; Cognitive Radio; Spectrum sensing; filter bank; multicarrier modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2012 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-0436-8

Type

conf

DOI

10.1109/WCNC.2012.6214479

Filename

6214479