认知无线电频谱感知硬判决融合算法
首发时间:2010-12-31
摘要:随着无线通信业务的快速增长,日益增长的频谱需求与有限的频谱资源之间的矛盾已成为制约无线通信发展的主要瓶颈之一。而认知无线电技术作为一种智能频谱共享技术,能够感知无线通信环境,根据一定的学习和决策算法,动态的感知和有效的利用空闲频谱。在认知无线电中,通过频谱感知搜集无线环境的统计信息,能为高层的频谱管理提供辅助,同时也能为系统的功率控制提供必要的参数支持。因此,频谱感知是构建认知无线电系统的前提。针对单节点频谱感知算法容易受信道的多径衰落,阴影效应以及隐藏站点的影响,本文研究了多节点协作硬判决融合算法。主要的融合规则有“与”逻辑、“或”逻辑等融合规则。仿真证明硬判决数据融合比单节点能量算法的感知性能有很大的提高。
For information in English, please click here
Cognitive radio spectrum sensing algorithm of hard decision fusion
Abstract:With the rapid growth of wireless communication service, the contradiction between increasing demands of spectrum and the limited spectrum resources has become one major bottleneck to restrict the development of wireless communication. Cognitive radio acting as an intelligent technology of sharing spectrum, can sense wireless communication environment, dynamically find out spectrum hole and effectively use it according to a certain degree of learning and decision-making algorithm. Cognitive radio can assist the height-level management of spectrum by collecting statistical information of wireless communication environment; at the same time can provide necessary parameters for the power control of the system. Therefore spectrum sensing is the precondition of building cognitive radio system. After investigation into the spectrum sensing for single node based on energy detector, a problem is found out: It is affected by multipath fading channel, the shadow effect and the impact of hidden sites. To solve this problem. This dissertation proposes a new method named cooperative spectrum sensing by multiple cognitive radio users. At present the main fusion rules are "AND" rule and "OR" rule.
Keywords: Cognitive radio spectrum sensing information fusion rule D-S fusion rule
论文图表:
引用
No.4401054561228129****
同行评议
共计0人参与
勘误表
认知无线电频谱感知硬判决融合算法
评论
全部评论0/1000