RoF系统中不同调制格式的色散特性研究  

Dispersion Characteristic Research under Different Modulation Formats in RoF System

作　　者：罗登 聂娟[1] 唐剑[1] 王世维[1] 

机构地区：[1]桂林电子科技大学研究生院,广西桂林541004

出　　处：《广西通信技术》2013年第1期27-30,50,共5页Guangxi Communication Technology

基　　金：国家自然科学基金项目(No.61077036);广西青年科学基金(No.2011GXNSFB018069)

摘　　要：RoF技术作为4G研究的热点问题近年来引起了国内外学者的广泛关注。光纤色散是严重影响系统性能的一个重要因素。从理论上分析了色散引起的毫米波信号线性失真和基带信号码元时移效应,并分别推导了色散对双边带调制、单边带调制和光抑制载波调制的影响,仿真结果显示光抑制载波调制格式具有更强的抗色散能力。As a hot topic of 4G,RoF technologies has attracted widespread concerns by domestic and international scholars in recent years.The fiber chromatic dispersion is a key factor which seriously effects system performance.This article analyzed millimeter-wave signal linear distortion and base-band signal code time shifting effect induced by fiber chromatic dispersion theoretically,and deduced the effects of double sideband modulation、single sideband modulation and optical carrier suppression modulation caused by chromatic dispersion,respectively.The simulation results have shown that optical carrier suppression format has a better capacity of endure chromatic dispersion than others.

关 键 词：ROF 色散 线性失真 码元时移效应 

分 类 号：TN929.1[电子电信—通信与信息系统]