Blind frequency offset estimation based on cyclic prefix and virtual subcarriers in CO-OFDM system

被引：14
|
作者：
Qiao, Yaojun [1 ]
Wang, Zhansheng [1 ]
Ji, Yuefeng [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Minist Educ MOE, Key Lab Informat Photon & Opt Commun IPOC, Beijing 100876, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2010年 / 8卷 / 09期
基金：
中国国家自然科学基金;
关键词：
COHERENT OPTICAL OFDM; TIME;
D O I：
10.3788/COL20100809.0888
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new blind frequency offset estimation method based on cyclic prefix and virtual subcarriers in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system is presented. It is able to estimate the fractional part and integral part of frequency offset at the same time. Its estimation range is about [-3.5 GHz, 3.5 GHz]. The influence of the integral frequency offset is comprehensively analyzed in CO-OFDM system. Its performances in the additive white Gaussian noise (AWGN) channel and the dispersive channel are investigated, respectively. Simulation results indicate that even in the dispersive channel, when the optical signal-to-noise ratio (OSNR) is low, it can still work very well.
引用
收藏
页码：888 / 893
页数：6
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