Delayed correlation based signal detection scheme with filter bank for OFDM signal

Hiroyuki Odani; Shoya Uchida; Ryo Takai; Yukitoshi Sanada

doi:10.1587/transcom.E98.B.1381

Delayed correlation based signal detection scheme with filter bank for OFDM signal

Hiroyuki Odani, Shoya Uchida, Ryo Takai, Yukitoshi Sanada

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Delayed correlation has been used to detect orthogonal frequency division multiplexing symbols with cyclic prefix in spectrum sensing. Because of the frequency offset, the outputs of the delayed correlation do not lie only on the real axis of a complex plane. Therefore, the absolute value of the outputs of the delayed correlation is employed. Furthermore, with the use of a filter bank, the number of the outputs of the delayed correlators increases and the averaging over the outputs decreases the noise variance. This paper proposes a new delayed correlation scheme that uses a filter bank and employs the absolute of the outputs of delayed correlation. The proposed scheme improves the probability of detection as the number of the branches of the delayed correlators increases. In the case of 6 branches, the proposed scheme reduces the required sample energy by 1 dB the probability of detection of 0.9.

Original language	English
Pages (from-to)	1381-1389
Number of pages	9
Journal	IEICE Transactions on Communications
Volume	E98B
Issue number	7
DOIs	https://doi.org/10.1587/transcom.E98.B.1381
Publication status	Published - 2015 Jul 1

Keywords

Delayed correlation
Spectrum sensing

ASJC Scopus subject areas

Electrical and Electronic Engineering
Computer Networks and Communications
Software

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10.1587/transcom.E98.B.1381

Cite this

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abstract = "Delayed correlation has been used to detect orthogonal frequency division multiplexing symbols with cyclic prefix in spectrum sensing. Because of the frequency offset, the outputs of the delayed correlation do not lie only on the real axis of a complex plane. Therefore, the absolute value of the outputs of the delayed correlation is employed. Furthermore, with the use of a filter bank, the number of the outputs of the delayed correlators increases and the averaging over the outputs decreases the noise variance. This paper proposes a new delayed correlation scheme that uses a filter bank and employs the absolute of the outputs of delayed correlation. The proposed scheme improves the probability of detection as the number of the branches of the delayed correlators increases. In the case of 6 branches, the proposed scheme reduces the required sample energy by 1 dB the probability of detection of 0.9.",

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AU - Odani, Hiroyuki

AU - Uchida, Shoya

AU - Takai, Ryo

AU - Sanada, Yukitoshi

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Y1 - 2015/7/1

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AB - Delayed correlation has been used to detect orthogonal frequency division multiplexing symbols with cyclic prefix in spectrum sensing. Because of the frequency offset, the outputs of the delayed correlation do not lie only on the real axis of a complex plane. Therefore, the absolute value of the outputs of the delayed correlation is employed. Furthermore, with the use of a filter bank, the number of the outputs of the delayed correlators increases and the averaging over the outputs decreases the noise variance. This paper proposes a new delayed correlation scheme that uses a filter bank and employs the absolute of the outputs of delayed correlation. The proposed scheme improves the probability of detection as the number of the branches of the delayed correlators increases. In the case of 6 branches, the proposed scheme reduces the required sample energy by 1 dB the probability of detection of 0.9.

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Delayed correlation based signal detection scheme with filter bank for OFDM signal

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