Spectrum Sensing Algorithm Based on Double Threshold and Two-Stage Detection Under a Low SNR

Spectrum Sensing Algorithm Based on Double Threshold and Two-Stage Detection Under a Low SNR In cognitive radio networks, spectrum sensing algorithms almost perform poor in low signal-to-noise ratio (SNR) sensing environment, it does need to improve detection probability by increasing the detection time. In order to solve the mentioned problems, a new spectrum sensing algorithm based on the double threshold and two-stage detection strategy under the condition of low SNR is put forward in this paper. First of all, when a false-alarm probability is given, the sampling length is found out under the different SNR level. Then the first stage detection is carried out by designing the two detection threshold. Finally the second stage detection is implemented for the center portion of the double threshold and the final detection result is gotten. Simulations and analysis show that, when the SNR is low, the proposed algorithm not only has a short average sensing time but also has a good performance in a small false-alarm probability constraint condition and low algorithm complexity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wireless Personal Communications Springer Journals

Spectrum Sensing Algorithm Based on Double Threshold and Two-Stage Detection Under a Low SNR

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Engineering; Communications Engineering, Networks; Signal,Image and Speech Processing; Computer Communication Networks
ISSN
0929-6212
eISSN
1572-834X
D.O.I.
10.1007/s11277-017-4236-x
Publisher site
See Article on Publisher Site

Abstract

In cognitive radio networks, spectrum sensing algorithms almost perform poor in low signal-to-noise ratio (SNR) sensing environment, it does need to improve detection probability by increasing the detection time. In order to solve the mentioned problems, a new spectrum sensing algorithm based on the double threshold and two-stage detection strategy under the condition of low SNR is put forward in this paper. First of all, when a false-alarm probability is given, the sampling length is found out under the different SNR level. Then the first stage detection is carried out by designing the two detection threshold. Finally the second stage detection is implemented for the center portion of the double threshold and the final detection result is gotten. Simulations and analysis show that, when the SNR is low, the proposed algorithm not only has a short average sensing time but also has a good performance in a small false-alarm probability constraint condition and low algorithm complexity.

Journal

Wireless Personal CommunicationsSpringer Journals

Published: Apr 27, 2017

References

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