基于认知的短波动态频谱孔洞率与时效性研究  

Research on spectrum hole probability and effectiveness for a given period of time of dynamic spectrum of HF channel based on cognition

作　　者：闫建峰[1] 郭锐[1] 田骅[1] 

机构地区：[1]中国舰船研究院,北京100192

出　　处：《舰船科学技术》2011年第6期56-60,112,共6页Ship Science and Technology

基　　金：国家自然科学基金重点资助项目(60832006)

摘　　要：短波认知系统通过实时认知工作频段内频谱空洞的具体位置来确定通信频率,根据频谱空洞内噪声变化情况,动态调整工作参数躲避干扰,极大提高了系统抗干扰能力。本文依托长期短波频谱监测经验和基于能量检测的方法,研究了短波频段频谱空洞孔洞率与时效性,验证了频谱空洞具有可选性与瞬时稳定性的特征,为短波动态频谱接入的应用奠定了基础。Through the specific location of spectrum hole in the working frequency band,HF cognitive system can ascertain the communication frequency.Based on the variation of noise power in the spectrum hole,HF cognitive system changes the working parameter to avoid the interference,which can significantly improve the system ability of anti-interference.Using energy detection method,we have inspected the HF channel for a long time.In this paper,we have studied the spectrum hole probability and effectiveness for a given period of time of spectrum hole and validated that the spectrum hole possess the character of optional and transient-stability.All those researches establish the foundation of HF dynamic spectrum access in engineering application.

关 键 词：频谱空洞 孔洞率 时效性 

分 类 号：TN97[电子电信—信号与信息处理]