计算机科学 ›› 2013, Vol. 40 ›› Issue (Z6): 276-279.
李小强,沈越泓,李颖,丁豪杰,汪李峰
LI Xiao-qiang,SHEN Yue-hong,LI Ying,DING Hao-jie and WANG Li-feng
摘要: 频谱感知是认知无线电的关键技术之一。在信噪比较低并且对主用户信号先验知识知道较少的情况下,主用户检测对于认知无线电设备来说是非常重要的。对有噪MFSK信号在循环频率处基于一阶循环矩检测器的性能进行了较为深入的理论分析,并推导了采样长度有限时噪声一阶循环矩幅度及有噪MFSK信号在循环频率处一阶循环矩幅度的概率密度函数公式;据此给出了该检测器的ROC特性曲线计算方法。理论分析表明,随着采样长度的增加,该检测器的性能显著提高;同等条件下,随着MFSK信号进制数M的增加,检测器性能有所下降。
[1] FCC.Spectrum Policy Task Force Report [R].Washington:FCC,2003 [2] Islam M H,Koh C L,Oh S W,et al.Spectrum survey in Singapore:Occupancy measurements and analysis [C]∥Proc.3rd Int.Conf.CROWNCOM.Singapore,May 2008:1-7 [3] Datla D,Wyglinski A M,Minden G J.A spectrum surveyingframework for dynamic spectrum access networks [J].IEEE Trans.Veh.Technol,2009,58(8):4158-4168 [4] Mitola J,Maguire G Q.Cognitive radio:Making software radios more personal [J].IEEE Pers.Commun,1999,6(4):13-18 [5] Mitola J.Cognitive radio—An integrated agent architecture forsoftware-defined radio [D].Sweden:Royal Institute of Techno-logy,2000 [6] Haykin S,Thomson D,Reed J.Spectrum sensing for cognitive radio [J].Proceedings of the IEEE,2009,97(8):849-877 [7] Dobre,Rajan S,Inkol R.Joint Signal Detection and Classification Based on First Order Cyclostationarity for Cognitive Radios [J].EURASIP Journal on Advances in Signal Processing-special issue on dynamic,2009,9 [8] Porat B.Digital Processing of Random Signals:Theory and Me-thods [M].New Jersey:Dover Publications,2008 [9] Proakis J G.Digital Communications(4th edition)[M].Beijing:Publishing House of Electronics Industry,2001 [10] 徐以涛.数字信号处理 [M].西安:西安电子科技大学出版社,2009 [11] 盛骤,谢式千.概率论与数理统计(第三版) [M].杭州:高等教育出版社,1989 |
No related articles found! |
|