宽带HFC中16QAM窄带噪声抑制的研究  

Study of suppressing noise on upstream channel in HFC network

作　　者：景新幸[1] 金奕丹[2] 刘贤德[1] 

机构地区：[1]华中科技大学光电子工程系,湖北武汉430074 [2]桂林电子工业学院通信与信息工程系,广西桂林541004

出　　处：《华中科技大学学报（自然科学版）》2004年第4期99-101,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：广西壮族自治区自然科学基金资助项目 (桂科自 0 2 2 90 5 3)

摘　　要：将输入噪声抽象为一种窄带干扰 ,从数字信号处理的角度对其采取非线性抑制措施 ,并把非线性的CDLMS ,CDRLS和归一化FTF算法运用到了该干扰抑制器中 ,提高了信号处理的实时性 .A model of narrowband interference was abstracted from the ingress noise and a nonlinear suppression measurement was taken from the point of signal processing. Nonlinear CDLMS (complex decision-directed LMS),CDRLS (complex decision-directed RLS) and FTF algorithm were applied to the interference suppresser. They can improve the real-time property of signal processing. Simulative results showed that it improved SNR and code error probability in 16QAM modem system.

关 键 词：HFC回传系统 窄带噪声 非线性 16QAM FTF算法 

分 类 号：TN911.7[电子电信—通信与信息系统]