Journal of Signal Processing
Online ISSN : 1880-1013
Print ISSN : 1342-6230
ISSN-L : 1342-6230
Autocorrelation-Based Spectrum Sensing for OFDM Signals over Multipath Fading Channel in Cognitive Radio Systems
Mousumi HaqueTetsuya Shimamura
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2018 年 22 巻 6 号 p. 265-275

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抄録
In this paper, a spectrum-sensing method is proposed which exploits the combination of a comb filter and autocorrelation function. The proposed method improves the detection performance in severe noise environments, where a cyclic prefix (CP)-based orthogonal frequency division multiplexing (OFDM)-transmitted signal is considered. In our proposed method, the primary user information is not required for spectrum sensing. The detection performance is measured over additive white Gaussian noise (AWGN) and multipath Rayleigh fading channels for different digital modulations. A comprehensive evaluation by simulation shows that the proposed method significantly outperforms the conventional schemes at a low signal-to-noise ratio (SNR).
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© 2018 Research Institute of Signal Processing, Japan
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