认知无线电中的一种频谱盲感知算法  

One method of blinding sensing for cognitive radio

作　　者：陈昊[1,2] 杨俊安[1,2] 吴彦华[1,2] 

机构地区：[1]解放军电子工程学院,安徽合肥230037 [2]安徽省电子制约技术重点实验室,安徽合肥230037

出　　处：《系统工程与电子技术》2009年第6期1311-1313,共3页Systems Engineering and Electronics

基　　金：国家自然科学基金项目(60175018);安徽省自然科学基金项目(050420101)资助课题

摘　　要：认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术,它能够通过与其运行环境交互而改变其发射机参数,特别是可让未授权用户使用授权用户的频谱,此外,它还为网络及终端提供更高的灵活性。高可靠性的频谱感知是实现频谱共享的关键。在分析了Parthapratim De提出的认知无线电中频谱BlindingSensing算法的基础上提出了利用数据前、后向线性预测与矩阵QR分解结合的新算法。仿真实验表明,在同样的无线传输环境下,新算法比原算法能更可靠地感知频谱空穴。Cognitive radio is an intelligent technology of increasing spectrum utilization, which can change its transmitter parameters based on interaction with the environment where it operates. It can be used to improve the spectrum access and efficiency of the spectrum use; especially it enables an unlicensed user to use the licensed spectrum. It also makes network terminals more flexible. The key to share the spectrum is sensing spectrum reliably. A novel method of integrating forward is proposed and backward linear prediction with matrix QR decomposition based on the blinding sensing algorithm proposed by Partbapratim De. Simulation results demonstrate the new method can sense the spectrum void more reliably under the same wireless transmitting environment compared with the original blinding sensing algorithm.

关 键 词：认知无线电 盲感知 预测误差 QR分解 

分 类 号：TN929.52[电子电信—通信与信息系统]