认知无线电频谱转换技术浅析

认知无线电的提出，能够在一定程度上提高频谱利用率，解决目前无线频谱资源紧缺的问题。而准确快速的频谱转换技术是其实现的关键。文章分析了几种常用的频谱转换方法，比较了它们的优缺点；介绍了频谱转换技术的标准化进程，最后指出了频谱转换领域亟待解决的问题及今后进一步深入研究的方向。

Analysis of CR Spectrum Mobility Technology

Cognitive radio （CR） is viewed as a novel approach for improving the spectrum utilization and solving the problem of limited spectrum resource. Spectrum mobility is the key technology for enabling eognitive radio networks. This paper presents several sehemes used for spectrum mobility, comparing the pros and cons of them. More specifically, the discussion focuses on the standardization of the spectrum mobility. Finally, we outline some challenges which hinder the implementation of spectrum mobility, in other words, the popular research fields are presented.