CAJ | 학술논문

频谱检测技术是无线电提高频谱利用率的重要环节，认知无线电在杂波融合条件下频谱感知检测受到杂波阴影衰落的影响，降低频谱检测概率。传统方法采用AD转换网络拓扑结构进行频谱感知，受到动态门限检测的影响，频谱感知检测效果不佳。提出一种基于动态阈值加权能量检测模型的无线电频谱感知检测算法，引入衰落传输融合拓扑结构，设计杂波背景下的信道融合准则，定义信道衰落因子，动态调整各认知用户的检测门限和传输可信度，基于动态阈值和可信度实现协作频谱感知检测，仿真实验证明采用该算法能大幅提高对无线电感知频谱的检测概率，克服传输信道中存在的阴影衰落的影响，检测性能优于传统算法。
빈보검측기술시무선전제고빈보이용솔적중요배절，인지무선전재잡파융합조건하빈보감지검측수도잡파음영쇠락적영향，강저빈보검측개솔。전통방법채용AD전환망락탁복결구진행빈보감지，수도동태문한검측적영향，빈보감지검측효과불가。제출일충기우동태역치가권능량검측모형적무선전빈보감지검측산법，인입쇠락전수융합탁복결구，설계잡파배경하적신도융합준칙，정의신도쇠락인자，동태조정각인지용호적검측문한화전수가신도，기우동태역치화가신도실현협작빈보감지검측，방진실험증명채용해산법능대폭제고대무선전감지빈보적검측개솔，극복전수신도중존재적음영쇠락적영향，검측성능우우전통산법。
Spectrum detection technology is an important factor to improve the spectrum utilization of radio, and cognitive radio is affected by the clutter shadow fading, reduce spectrum detection probability. The traditional method using AD con-version network topology, it is influenced by dynamic threshold detection, and the detection performance is poor. A kind of radio spectrum sensing detection algorithm is proposed based on dynamic threshold weighted energy detection model, the fading transmission fusion topology is designed, channel wave background fusion rule is obtained, and fading factor of chan-nel is defined, the transmission signal to noise ratio distribution reliability, dynamic adjustment of the detection threshold and the transmission probability assignment for each cognitive user are carried out, and the cooperative spectrum sensing detection based on dynamic threshold and credibility is realized, the simulation experiment shows that the algorithm can greatly improve the detection probability of the radio spectrum sensing, overcome the problems of transmission channel in the shadow fading influence, the detection performance is better than the traditional algorithm.