Systems Engineering and Electronics ›› 2025, Vol. 47 ›› Issue (9): 3109-3116.doi: 10.12305/j.issn.1001-506X.2025.09.33

• Communications and Networks • Previous Articles    

Cooperative spectrum sensing method based on ICEEMDAN and HHO under low signal to noise ratio

Quanquan WANG1,*, Songlin XIE1,2(), Zhihao GU1, Chengkun WU3, Gengxin ZHANG1   

  1. 1. School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
    2. Portland Institute,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
    3. State Radio Monitoring Center,Beijing 100037,China
  • Received:2024-07-24 Online:2025-09-25 Published:2025-09-16
  • Contact: Quanquan WANG E-mail:1023213130@njupt.edu.cn

Abstract:

A cooperative spectrum sensing method based on improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN) and Harris hawks optimization (HHO) is proposed to solve the problem of constrained spectrum sensing performance under low signal to noise ratio. Firstly, the signal uploaded by secondary users is processed by ICEEMDAN to acquire the intrinsic mode function (IMF) components. Secondly, the correlation coefficient of the primary user (PU) signal of known waveform and each IMF component is calculated. Some IMF components with correlation coefficient above a threshold are selected and accumulated to derive the reconstructed signals. Thereafter, the average energy value of the reconstructed signals is used as the feature value to train the support vector machine (SVM) model, and the HHO is used to optimize the SVM parameters. Finally, the optimized SVM model is used to detect the presence of PU. The experimental results demonstrate that the proposed method has higher detection probability, accuracy, and better sensing performance under low signal to noise ratio.

Key words: cooperative spectrum sensing, improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN), noise reduction, Harris hawks optimization (HHO), support vector machine (SVM)

CLC Number: 

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