Double thresholds energy detection based cooperative spectrum sensing for cognitive radios

作者：Liu, Shiqi^*; Chen, Chongqian; Li, Haihong; Hu, Binjie

来源：Chinese Journal of Radio Science, 2013, 28(3): 420-424.

• Co-operative spectrum sensing
• Cognitive radio network
• Communication overheads
• Detection performance
• Double threshold
• Energy detection
• Intermediate energies
• Spectrum sensing

The identification of the primary user is one of the most important issues in the spectrum sensing process for the cognitive radio networks. In order to improve the detection performance of spectrum sensing networks, double-threshold energy detection based cooperative spectrum algorithm is proposed. Soft combination of the observed energy value from different cognitive radio users is investigated to solve the sensing failure problem in conventional two-threshold energy detection. We further propose to combine the intermediate energy values only when the sensing failure problem occurs. Results show that the proposed method achieves a good tradeoff between sensing performance and communication overhead.

• 出版日期2013-6
• 单位华南理工大学