Abstract: A new cooperative spectrum sensing method based on reputation for cognitive radios under bandwidth constraints is proposed.Every cognitive user firstly obtains an observation independently and only the users with reliable information send their local decisions to the common receiver based on double thresholds.If no user is reliable，only the cognitive user with the highest reputation is selected to sense the spectrum.Simulation results show that the spectrum sensing performance under AWGN channels is improved and the communication traffic is also reduced as opposed to the conventional method.

摘要： 提出了一种在认知无线网络控制信道带宽受限条件下基于信任度的双门限协同频谱感知算法。首先每个认知用户基于双检测门限独立进行频谱感知，但只有部分可靠的认知用户通过控制信道向认知无线网络基站发送本地感知结果。当所有的用户都不可靠时，选取信任度最高的认知用户发送本地感知结果进行判决。理论分析和仿真表明，同常规能量检测算法相比较，该算法能够在控制信道带宽受限条件下，以较少的网络开销获得更好的频谱感知性能。