Signal Detection Performance of Overlapped FFT Scheme with Additional Frames Consisting of Non-continuous Samples in Indoor Environment

Shoya Uchida, Akihiro Sato, Mamiko Inamori, Yukitoshi Sanada, Mohammad Ghavami

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Overlapped FFT has been proposed as a signal detection scheme in dynamic spectrum access to reduce the variance of the noise and improve the detection probability. However, the improvement of the detection probability in the conventional overlapped FFT is bounded with the upper limit of the overlap ratio. This paper proposes a new overlapped FFT scheme using additional frames. In the proposed scheme, in addition to the original FFT frames, new frames that consist of multiple subframes with non-continuous samples are constructed and included. It can realize the increase of the number of the FFT frames and the improvement of the detection probability compared with the conventional scheme. Numerical results through computer simulation show that the proposed scheme improves the detection probability by up to 0.07. On indoor channel models the proposed scheme also improves the detection probability. In addition, it is clarified that as the delay spread increases the detection probability reduces due to the correlation between the frames.

    Original languageEnglish
    Pages (from-to)987-1002
    Number of pages16
    JournalWireless Personal Communications
    Volume79
    Issue number2
    DOIs
    Publication statusPublished - 2014 Oct 22

    Keywords

    • Cognitive radio
    • Overlapped FFT
    • Spectrum sensing

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering

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