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Future Internet 2018, 10(2), 12; https://doi.org/10.3390/fi10020012

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

Information Science and Technology College, Dalian Maritime University, Dalian 116026, China
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Received: 28 November 2017 / Revised: 24 January 2018 / Accepted: 24 January 2018 / Published: 29 January 2018
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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. View Full-Text
Keywords: cognitive radio; spectrum sensing; silence period; energy detection; signaling channel cognitive radio; spectrum sensing; silence period; energy detection; signaling channel
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Zhang, J.; Sun, Z.; Zhang, S. The Improved Adaptive Silence Period Algorithm over Time-Variant Channels in the Cognitive Radio System. Future Internet 2018, 10, 12.

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