频谱感知需要的认知无线电中顺序，寻找机会频谱的灵活使用。此外，它是干扰的管理造成水平的关键向初级用户 （PUs） 的频谱。遥感提供了
无线电操作环境的意识。认知电台可然后适应它的参数如载波频率电源和波形动态调整提供最好的服务可用的连接，以满足用户的需求范围内
对干扰约束。无线通信系统中，我们通常有一些对波形的知识和结构或统计属性的信号的频谱的主要用户使用。这种知识可能相关的调制
计划、 符号或芯片的信号，通道的速率。(Spectrum sensing requires the order of cognitive radio, looking for flexible use of opportunistic spectrum. In addition, it is the spectrum that disturbs the level of management caused by primary users (PUs). Remote sensing provides awareness of the radio operating environment. Cognitive stations can then adapt to its parameters such as carrier frequency power and waveform dynamics to provide the best service available to connect to meet user constraints on interference requirements. In wireless communication systems, we usually have some primary users who have knowledge of the waveform and the spectrum of the signal of the structure or statistic properties. This knowledge may be related to the modulation scheme, symbol or chip signal, channel speed.)