摘要
认知无线电技术作为软件无线电技术的一个特殊扩展,受到日益广泛的关注。由于该技术能够自动检测无线电环境,调整传输参数,从空间、时间、频率、调制方式等多维度共享无线频谱,可以大幅度提高频谱利用效率。本文首先从认知无线电技术的定义入手,分别讨论了认知无线电的基本概念、功能与实现、标准化的进程。然后介绍了当前应用状况,最后分析了未来的发展及面临的挑战。
Cognitive radio （CR） technology, as a special extent of software radio, is becoming the ＂next big thing＂ in wireless communications. CR can sense its operational electromagnetic environment autonomously and adjust its radio operating parameters dynamically. Due to the multi-dimensional reuse of spectrum, CR can significantly improving the spectrum efficiency. This paper discusses the definition of CR, the fundamental concepts, basic functions, system implementation and standardization. It also discusses current application situation and analyses the trends and challenges in the future.
出处
《电信科学》
北大核心
2006年第7期57-60,共4页
Telecommunications Science
关键词
认知无线电
软件无线电
频谱管理
宽带无线接入
cognitive radio, software radio, spectrum management, broadband wireless access
