认知无线电技术及其政策影响和市场前景预测

Policy Influence and Market Prospect Forecast for Cognitive Radio Technology

认知无线电是在软件无线电的基础上发展而来的能够自适应外界环境变化的无线通信技术。认知无线电的网络结构有3种类型:集中式,分布式和集中+分布式。它通过频谱自适应技术来实现动态频谱分配,相关技术包括频谱检测技术,信道估计与预测技术、数据传输技术和多天线通信技术。随着认知无线电技术的发展,各国际标准组织和行业联盟纷纷开展相关的研究,并着手制定认知无线电的标准和协议。目前,认知无线电的推广仍面临着政策问题,但其市场需求日益扩大。总而言之,此技术的产业化发展还有很长的路需要走。

Cognitive radio is a wireless communications technology that is self-adaptive to environment and is based on the software defined radio. There are three types of cognitive radio architectures： centralized, distributed, and centralized＋distributed. Cognitive radio uses spectrum adaptive technology to realize dynamic spectrum allocation, as well as the spectrum testing, channel estimation and prediction, data transmission, and multi-antenna communications technologies. With its development, international standardization organizations and industry alliances start to research and establish standards and protocols for cognitive radio. Nowadays, the popularization still faces policy problem, but the market demand is gradually increasing. In a word there is still a long road for the industry development of cognitive radio.