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认知无线电技术能够让非授权用户利用已经分配给授权用户的某些频段.为了不对授权用户的通信造成干扰,认知用户需要对频谱进行不断的感知来判断授权用户是否存在.因此,频谱感知是认知无线电技术的前提和基础.本文介绍了几种主要的频谱感知技术,重点分析了能量检测的基本原理,并提出基于能量感知的合作式感知技术将是最可靠、灵敏度最高、最有发展前景的感知技术.
Cognitive radio technology allows unauthorized users to use certain frequency bands that have been allocated to authorized users.In order not to interfere with authorized users’ communication, cognitive users need to continuously sense the spectrum to determine whether authorized users exist.So spectrum sensing Is the premise and foundation of cognitive radio technology.This paper introduces several major spectrum sensing technologies, focuses on the basic principles of energy detection, and proposes that the cooperative sensing technology based on energy perception will be the most reliable and highest sensitivity, the most Perception Technology for Prospects.