Cooperative energy detection spectrum sensing method based on Lightgbm algorithm
A technology of energy detection and spectrum sensing, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of single primary user, does not take into account the topology model, and is not applicable, so as to reduce the risk of misclassification, which is of great significance. strong practical effect
Inactive Publication Date: 2019-10-22
SOUTHWEST JIAOTONG UNIV
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Abstract
The invention discloses a cooperative energy detection spectrum sensing method based on a Lightgbm algorithm. The method specifically comprises: in a cognitive wireless network, a secondary user detecting energy in a current channel environment and sending a result to a secondary user serving as a fusion center, and a primary user discontinuously sending a label indicating whether spectrum resources are used by the primary user or not to the fusion center; establishing a data set by using an energy detection-based method, wherein the Lightgbm algorithm specifically uses a gradient-based unilateral sampling technology and a unique feature binding technology; dividing the constructed energy feature vector set into a training set and a test set, and performing training and testing respectively; the fusion center distinguishing whether a channel is available or not, and informing all secondary users after a result is obtained. According to the method, under the condition that the false alarm rate 0.1 meeting the IEEE802.11 requirement is used, the detection rate is increased by 6%-7% compared with an SVM, and meanwhile the false classification rate and the false classification risk areremarkably reduced.
Application Domain
Transmission monitoring
Technology Topic
Unilateral samplingEnergy based +11
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