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

Hiroyuki Odani, Shoya Uchida, Ryo Takai, Yukitoshi Sanada

    Research output: Contribution to journalArticlepeer-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 languageEnglish
    Pages (from-to)1381-1389
    Number of pages9
    JournalIEICE Transactions on Communications
    VolumeE98B
    Issue number7
    DOIs
    Publication statusPublished - 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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