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The Improved Adaptive Silence Period Algorithm over Time-Variant Channels in the Cognitive Radio System

Author

Listed:
  • Jingbo Zhang

    (Information Science and Technology College, Dalian Maritime University, Dalian 116026, China)

  • Zhenyang Sun

    (Information Science and Technology College, Dalian Maritime University, Dalian 116026, China)

  • Shufang Zhang

    (Information Science and Technology College, Dalian Maritime University, Dalian 116026, China)

Abstract

In the field of cognitive radio spectrum sensing, the adaptive silence period management mechanism (ASPM) has improved the problem of the low time-resource utilization rate of the traditional silence period management mechanism (TSPM). However, in the case of the low signal-to-noise ratio (SNR), the ASPM algorithm will increase the probability of missed detection for the primary user (PU). Focusing on this problem, this paper proposes an improved adaptive silence period management (IA-SPM) algorithm which can adaptively adjust the sensing parameters of the current period in combination with the feedback information from the data communication with the sensing results of the previous period. The feedback information in the channel is achieved with frequency resources rather than time resources in order to adapt to the parameter change in the time-varying channel. The Monte Carlo simulation results show that the detection probability of the IA-SPM is 10–15% higher than that of the ASPM under low SNR conditions.

Suggested Citation

  • Jingbo Zhang & Zhenyang Sun & Shufang Zhang, 2018. "The Improved Adaptive Silence Period Algorithm over Time-Variant Channels in the Cognitive Radio System," Future Internet, MDPI, vol. 10(2), pages 1-11, January.
    • Handle: RePEc:gam:jftint:v:10:y:2018:i:2:p:12-:d:129182
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    References listed on IDEAS

    as
    1. Yongqun Chen & Huaibei Zhou & Ruoshan Kong & Li Zhu & Huaqing Mao, 2017. "Decentralized Blind Spectrum Selection in Cognitive Radio Networks Considering Handoff Cost," Future Internet, MDPI, vol. 9(2), pages 1-8, March.
    2. Romano Fantacci & Dania Marabissi, 2016. "Cognitive Spectrum Sharing: An Enabling Wireless Communication Technology for a Wide Use of Smart Systems," Future Internet, MDPI, vol. 8(2), pages 1-17, May.
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