Low Complexity FFT Based Spectrum Sensing in Bluetooth System

Author

Oh, Dong-Chan ; Lee, Yong-Hwan

Author_Institution

Sch. of Electr. Eng., INMC Seoul Nat. Univ., Seoul

fYear

2009

fDate

26-29 April 2009

Firstpage

1

Lastpage

5

Abstract

In this paper, we propose a complexity reduced spectrum sensing technique for Bluetooth to find channels free from the use of other communication devices in 2.4 GHz ISM band. By exploiting the spectrum characteristics of interference sources, the proposed scheme detects the availability of channels by comparing the power spectrum density (PSD) with a threshold. To reduce the implementation complexity, the PSD is calculated by means of fast Fourier transform and linear interpolation. The threshold for the detection is determined to maximize the detection probability. To further improve the transmission performance, the proposed scheme dynamically changes the channels by measuring the transmission performance.

Keywords

Bluetooth; fast Fourier transforms; interpolation; probability; Bluetooth system; ISM band; detection probability; frequency 2.4 GHz; interference sources; linear interpolation; low complexity FFT; power spectrum density; spectrum sensing; Adaptive control; Bluetooth; Degradation; Fast Fourier transforms; Frequency; Interference; Interpolation; Personal area networks; Signal detection; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th

Conference_Location

Barcelona

ISSN

1550-2252

Print_ISBN

978-1-4244-2517-4

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2009.5073654

Filename

5073654