认知无线电技术

随着无线通信技术的发展。无线用户的数量急剧增加，使得频谱资源变得越来越紧张，如何充分提高无线频谱的利用率成为亟待解决的技术问题。认知无线电技术提出了一种新的解决思路。其核心思想就是使无线通信设备具有发现“频谱空洞”并合理利用所发现的“空洞”的能力。虽然认知无线电技术能以更为灵活的方式来管理有限的频谱资源，但要真正将其应用于实际通信系统还需解决包括频谱检测、自适应频谱资源分配和无线频谱管理等关键技术问题。

Cognitive Radio Technology

With the penetration of wireless communications technology, the number of wireless subscribers has increased dramatically. As a result, wireless bandwidth resources are becoming more and more limited over time. How to improve the efficiency of radio resources is a pressing problem. The cognitive radio technology brings a new idea for solving this problem. Its basic idea is to make wireless terminals have the abilities of detecting "spectrum holes" and making full use of them. This technology can be used to manage the valuable radio resources in a more flexible way, but for its practical use, some crucial technical problems still need to be solved, involving spectrum detection, adaptive bandwidth allocation and spectrum management technologies.