Presentation 2014-03-03
Window Functions for Frame Correlation Reduction in Overlapped FFT based Energy Detection
Ryo TAKAI, Shoya UCHIDA, Yukitoshi SANADA,
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Abstract(in English) Overlapped FFT based energy detection has been proposed as a signal detection scheme in dynamic spectrum access. The overlapped FFT scheme increases the number of FFT frames to reduce the variance of squared noise and improves the detection performance. As the FFT frames are overlapped, correlation values between the frames affect to the detection performance. This paper proposes the window functions that decrease the correlation values between adjacent FFT bins. Numerical results obtained through computer simulation show that novel window functions generated by upsampling a Hamming window improves the detection performance by 0.09. However, this window function suffers more from adjacent channel interference than a conventional window. Therefore, this paper also proposes a two step detection scheme to achieve higher detection performance and to avoid the influence of the adjacent channel interference. Result of computer simulation indicate that the proposed scheme improves the detection performance and reduces the effect from the adjacent channel signal.
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Keyword(in English) Cognitive radio / Overlapped FFT / Spectrum sensing
Paper # SR2013-101
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Conference Date 2014/2/24(1days)
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Registration To Software Radio(SR)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Window Functions for Frame Correlation Reduction in Overlapped FFT based Energy Detection
Sub Title (in English)
Keyword(1) Cognitive radio
Keyword(2) Overlapped FFT
Keyword(3) Spectrum sensing
1st Author's Name Ryo TAKAI
1st Author's Affiliation Dept. of Electronics and Electrical Engineering, Keio University()
2nd Author's Name Shoya UCHIDA
2nd Author's Affiliation Dept. of Electronics and Electrical Engineering, Keio University
3rd Author's Name Yukitoshi SANADA
3rd Author's Affiliation Dept. of Electronics and Electrical Engineering, Keio University
Date 2014-03-03
Paper # SR2013-101
Volume (vol) vol.113
Number (no) 457
Page pp.pp.-
#Pages 8
Date of Issue