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)


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
Issue number2
Publication statusPublished - 2014 Oct 22



  • Cognitive radio
  • Overlapped FFT
  • Spectrum sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

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