IEICE TRANSACTIONS on Communications
Window Functions for Frame Correlation Reduction in Overlapped FFT Based Energy Detection
Summary :
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 which 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 signal. Numerical results also indicate that the proposed scheme improves the detection performance and reduces the effect from the adjacent channel signal.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E98-B No.3 pp.485-493
- Publication Date
- 2015/03/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E98.B.485
- Type of Manuscript
- PAPER
- Category
- Terrestrial Wireless Communication/Broadcasting Technologies
Authors
Ryo TAKAI
Keio University
Shoya UCHIDA
Keio University
Yukitoshi SANADA
Keio University
Keyword
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Ryo TAKAI, Shoya UCHIDA, Yukitoshi SANADA, "Window Functions for Frame Correlation Reduction in Overlapped FFT Based Energy Detection" in IEICE TRANSACTIONS on Communications,
vol. E98-B, no. 3, pp. 485-493, March 2015, doi: 10.1587/transcom.E98.B.485.
Abstract: 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 which 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 signal. Numerical results also indicate that the proposed scheme improves the detection performance and reduces the effect from the adjacent channel signal.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E98.B.485/_p
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@ARTICLE{e98-b_3_485,
author={Ryo TAKAI, Shoya UCHIDA, Yukitoshi SANADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Window Functions for Frame Correlation Reduction in Overlapped FFT Based Energy Detection},
year={2015},
volume={E98-B},
number={3},
pages={485-493},
abstract={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 which 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 signal. Numerical results also indicate that the proposed scheme improves the detection performance and reduces the effect from the adjacent channel signal.},
keywords={},
doi={10.1587/transcom.E98.B.485},
ISSN={1745-1345},
month={March},}
Copy
TY - JOUR
TI - Window Functions for Frame Correlation Reduction in Overlapped FFT Based Energy Detection
T2 - IEICE TRANSACTIONS on Communications
SP - 485
EP - 493
AU - Ryo TAKAI
AU - Shoya UCHIDA
AU - Yukitoshi SANADA
PY - 2015
DO - 10.1587/transcom.E98.B.485
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E98-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2015
AB - 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 which 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 signal. Numerical results also indicate that the proposed scheme improves the detection performance and reduces the effect from the adjacent channel signal.
ER -
English
