认知无线电网络高能效协作频谱感知技术

Energy-Efficient Cooperative Spectrum Sensing in Cognitive Radio Networks

提出了一种协作频谱感知方式.通过对本地观测向量和预设门限的比较,认知用户可以根据本地感知的可靠性决定是否向基站发送本地判决结果.在不同控制信道条件下,采用计数准则和Neyman-Pearson准则对所提出的协作频谱感知方式进行了感知性能研究.理论分析和仿真结果表明,这种协作频谱感知方式在保证检测性能的基础上,有效减少了协作通信开销,提升了感知能效.

A new cooperative spectrum sensing scheme is proposed to reduce the cooperation overhead. After comparing the local observation with the threshold,the user could decide,whether or not,to transmit local decision to the base station. Two fusion rules,counting rule and Neyman-Pearson rule,are investigated for the proposed sensing scheme. Analysis and simulation show that the proposed scheme guarantees sensing reliability without any performance loss and reduces the communication overhead significantly to achieve high energy efficiency in sensing cooperation.