一种认知无线电频谱检测新算法

认知无线电（cognitive radio，CR）是一种革命性智能频谱共享技术，可显著提高频谱使用率．该文提出一种基于似然比判决的协同频谱检测算法用于多用户认知无线电系统的主用户检测．该算法特别考虑了主用户和多个认知用户之间不同的信道衰落和路径衰减状况，并根据最优的似然比判决法组建数学模型，保证了检测算法的高度精确性．随后，对相关参数进行了合理简化，降低了算法复杂性．实验表明，该文算法拥有非常高的检测精度，复杂度也不高，能够更加有效地服务于实际的认知无线电系统．

A new algorithm for spectrum detection in cognitive radio system

Cognitive radio is a revolutionary spectrum sharing technology,which can significantly improve the spectrum utilization.This paper presents a likelihood ratio test algorithm for the spectrum sensing of cognitive radio systems.The algorithm,which uses energy detection as single-node detection method,takes the channel fading and path loss between the primary user and multiple users into consideration and builds the decision model according to the likelihood ratio,and then reduces the complexity of the algorit...