论文部分内容阅读
频谱感知技术中的单点检测设计复杂度低,采用技术成熟,易于实现,但是由于自身的局限性,面临着隐藏终端,感知灵敏度底等问题,而协作分集技术可以克服这些问题。基于解码转发(DF,DecodeAnd Forward)的协作频谱感知技术,利用了分集增益原理,提高了认知用户的单点检测概率,从而改善了整个无线电系统的性能。在瑞利衰落环境下对该检测方案进行分析,并通过与非协作检测的性能比较,说明了协作检测的优势。
The single-point detection in spectrum sensing technology has low complexity and is mature in technology and easy to implement. However, due to its limitations, it faces the problems of hidden terminal and perceptual sensitivity, and the cooperative diversity technology can overcome these problems. The cooperative spectrum sensing technology based on DecodeAnd Forward (DF) uses the principle of diversity gain to improve the single-point detection probability of cognitive users and improve the performance of the entire radio system. The detection scheme is analyzed under Rayleigh fading environment and the advantages of collaborative detection are demonstrated by comparison with the performance of non-cooperative detection.