Abstract: This paper proposes a spectrum hole sensing algorithm based on credibility to decrease the number of sensing bits sent to the common receiver. According to the energy detection theory, if the energy is located in the “decision” region, the cognitive user sends 1 bit or 2 bit self-adaptive quantization to report its sensing result based on sensing credibility factor and likelihood decision. Otherwise, the cognitive user sends nothing. Performance analysis and simulation results show that the average number of sensing bits decreases without noticeable loss in sensing performance while using this algorithm.

Key words: Cognitive Radio(CR), spectrum sensing, energy detection method, credibility factor

摘要： 提出一种基于可信度的频谱空穴侦听算法，减少向公共接收机发送的侦听比特数。根据能量检测理论，若能量分布在“判决”区域，则感知用户将发送1 bit或2 bit的自适应量化值，以报告基于侦听可信度因子和似然判决的感知结果，否则感知用户不发送信息。性能分析与仿真结果表明，该算法在确保侦听性能损失较小的情况下，能降低用户的平均侦听比特数。

关键词: 认知无线电, 频谱侦听, 能量检测法, 可信度因子

CLC Number: 

• TN911.7