论文部分内容阅读
以能量检测作为频谱感知的基本方法,以次用户平均信道效率作为衡量认知无线电系统性能的参考标准,分析了存在多条主用户信道时,在次用户频谱感知的不同阶段,感知时长对认知无线电系统性能的影响.推导了授权用户对干扰的防护得到满足的前提下,使次用户平均信道效率最大时,感知时长必须满足的条件,并通过仿真对理论分析进行了验证.仿真结果表明:次用户可以通过选择最佳的感知时长,使其平均信道效率得到优化.
Taking energy detection as the basic method of spectrum sensing and sub-user average channel efficiency as the reference standard to measure the performance of cognitive radio system, this paper analyzes that when there are multiple primary user channels, at different stages of sub-user spectrum sensing, The influence of the performance of the radio system is known.The condition that the perceptual duration must be satisfied when the average channel efficiency of the secondary user is satisfied under the precondition that the authorized users are satisfied with the interference protection is verified and the theoretical analysis is verified through the simulation results show that : Secondary users can optimize their average channel efficiency by choosing the best perceived duration.