摘要
认知无线电在无需专门授权的情况下,能够借助频谱感知等技术接入已授权频段,实现对无线频谱资源的动态共享,极大地提高频谱利用效率和通信系统性能,必将对无线通信,尤其是军事通信产生深远的影响。文中首先简要叙述了认知无线电产生的背景,尔后对频谱感知、位置感知、链路保持、频谱池共享等关键技术进行了简要叙述。重点分析了认知无线电在军事通信中的应用及其优势。最后对军用认知无线电面临的机遇和挑战做了简要展望。
Without special authorized, cognitive radio can dynamically share the wireless spectrum resource through accessing the authorized frequency band by virtue of spectrum sensing and other techniques. It can extremely improve the efficiency of the wireless spectrum usage and the capabilities of the communication system. It must be impact the wireless communication profoundly, especially military communication. In this paper, the background of the cognitive radio is introduced firstly. Then, some key techniques of the cognitive radio are simply described, such as spectrum sensing, location awareness, link maintenance and spectrum pooling. The application and advantages of the cognitive radio used in military communication are emphases discussed. Finally, some challenges and trends of the military cognitive radio in the future are presented.
出处
《无线通信技术》
2007年第4期31-35,共5页
Wireless Communication Technology
关键词
认知无线电
动态频谱共享
频谱感知
cognitive radio
dynamic spectrum sharing
spectrum sensing
