中文说明：应用背景该谱的HMM模型是 传感系统如图2.2所示。PU状态是所观察到的或输出的序列，这是一个二进制序列，其中二进制零表示信道处于空闲状态，并且一个表示信道在忙状态。它是真正的聚氨酯，聚氨酯激发模型执行空气界面的状态认知无线电（铬）关键技术联邦通信委员会 (FCC) 观察结果表明大多数分配的频谱的乐队用户不使用大部分时间持牌而无牌的谱正在耗尽由新兴的无线服务和应用程序 [1]。解决频谱利用率问题的问题，更多利用光谱e 调度员，FCC 最近建议动态分配的新概念频谱资源，被称为认知无线电 (CR) 技术。
English Description：
Application backgroundThe proposed Spectrum Sensing system model using HMM is shown in gure 2.2. PU status is the observed or output sequence, which is a binary sequence where binary zero represents that the channel is in idle state and one represents that the channel is in busy state. It is the true state of the PU, the PU excitation model perform air interface of cognitive radio (CR)Key TechnologyThe Federal Communication Commission (FCC) observation results show that most of the allocated spectrum band is not used most of the time by licensed users whereas an unlicensed spectrum is being exhausted by emerging wireless service and applications [1]. To solve the problem of spectrum utilization problem and to utilize the spectrum more eciently, the FCC has recently suggested a new concept for dynamically allocating the spectrum resource, which is called the cognitive radio