Next Article in Journal
Push Attack: Binding Virtual and Real Identities Using Mobile Push Notifications
Previous Article in Journal
Announcing the 2018 Future Internet Travel Award for PhD Students
Open AccessArticle

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
*
Author to whom correspondence should be addressed.
Future Internet 2018, 10(2), 12; https://doi.org/10.3390/fi10020012
Received: 28 November 2017 / Revised: 24 January 2018 / Accepted: 24 January 2018 / Published: 29 January 2018
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
Show Figures

Figure 1

MDPI and ACS Style

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.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop