摘要
如何提高无线电资源利用率已经成为一个研究热点。认知无线电是解决这个问题的一个新思路。正交频分复用技术是一种无线信道高速多载波传输技术。将来很可能在第四代通信和认知无线电得到应用。文章提出了一种基于正交频分复用的认知无线电系统中频谱资源分配和功率控制方案,并且给出了仿真结果,结果表明该方案用较低的复杂度实现了通信的需要。
How to improve the efficiency of radio resources becomes a hot spot problem. The cognitive radio technology is a new method for solving this problem. The OFDM technology is one kind of high speed multi-carrier transmission technology under wireless environment. In the future, OFDM may be widely used in cognition radio and in the 4G mobile communication. This article puts for- ward a policy of frequency selection and power control in cognitive radio system based on OFDM technology. At last this article simulates the OFDM technology in cognitive radio system. For meeting the requirement of communication, this system can use the spectrum resources more sufficiently by implementation of lower flexibility.
出处
《山西电子技术》
2010年第1期46-47,共2页
Shanxi Electronic Technology
关键词
认知无线电
正交频分复用
频谱管理
cognitive radio
orthogonal frequency division multiplexing
spectrum management
