CAJ | 학술논문

分析了认知无线电网络中使用能量检测器进行频谱检测的性能.仿真结果表明,衰落会使认知无线电用户检测性能下降,采用硬合并协作方案的合作频谱检测可以提高认知无线电系统的检测概率,但认知无线电系统的虚警概率也会随着参与协作的用户数的增多而上升,特别是控制信道不理想时,协作检测会导致虚警概率下限的出现,造成频谱利用率达不到预期的目标.
분석료인지무선전망락중사용능량검측기진행빈보검측적성능.방진결과표명,쇠락회사인지무선전용호검측성능하강,채용경합병협작방안적합작빈보검측가이제고인지무선전계통적검측개솔,단인지무선전계통적허경개솔야회수착삼여협작적용호수적증다이상승,특별시공제신도불이상시,협작검측회도치허경개솔하한적출현,조성빈보이용솔체불도예기적목표.
We analyzed the performance of spectrum sensing with energy detector in cognitive radio network. The resuits of simulation indicate that fading decreases the detection performance of an individual cognitive radio user, and hard combination cooperative spectrum sensing can improve the cognitive radio system's detection prohability, but the cognitive radio system's false alarm probability increases as the number of cooperative users increasing. Especially, when control channels ale not reliable, low bound of false alarm probability will appear and result in decrease of spectrum utilization.