Femtocell系统中认知无线电频谱感知技术

摘要

Femtocell技术是为解决3G网络的室内覆盖问题而提出,应用此技术可较好地改善室内信号质量。由于Femtocell同3G系统应用同样的频谱资源,因此可以应用认知无线电频谱感知技术解决频谱资源的复用问题。文中的研究背景为TD-SCDMA系统,分析了频谱感知的原理,给出了感知步骤,并提出了提高频谱感知精度的方法。%Femtocell technology was suggested for solving the indoor coverage of 3G networks.With the application of this technology,the indoor signal quality can greatly improve.As the Femtocell system uses the same spectrum resources with 3G systems,it can apply cognitive radio spectrum sensing technique to solve the reuse problem of spectrum resources.The background of this paper is TD-SCDMA system.This paper analyzes the principle of spectrum sensing,shows the steps of sensing and presents the method for improving the accuracy of spectrum sensing.