交互式有线电视同轴电缆分配网上行信道非线性失真分析  

The Analysis of Nonlinear Distortion in the Return Path of Coaxial Distribution Network in Interactive CATV

作　　者：赵问道[1] 宋耀光[1] 姚庆栋[1] 戴文琪[1] 

机构地区：[1]浙江大学信电系

出　　处：《通信学报》1998年第11期18-22,共5页Journal on Communications

摘　　要：本文指出在交互式有线电视同轴电缆分配网上行信道中由于放大器的存在会引起非线性失真，讨论用放大器可测指标来表征的放大器非线性失真模型。导出ＱＰＳＫ调制下非线性失真产物引起的信噪比恶化公式，并对具体放大器例子进行了计算分析。In this paper, the nonlinear distortion caused by amplifiers in the up link of coaxial distribution network in interactive CATV is pointed out, and the amplifier nonlinear distortion model expressed by the measurable amplifier parameters is then discussed. The deteriorated signal to noise formula caused by nonlinear distortion products under QPSK modulation is derived and some amplifier examples are analysed.

关 键 词：交互式 CATV 非线性失真 QPSK解调 同轴电缆 

分 类 号：TN943.1[电子电信—信号与信息处理]