Wide-Range Frequency Offset Estimation Method for a DD-OFDM-PON Downstream System

被引：5
|
作者：
Chen, Longquan [1 ]
Qiao, Yaojun [1 ]
Zhao, Yuan [1 ]
Ji, Yuefeng [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Optic Commun, Beijing 100876, Peoples R China
来源：
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING | 2012年 / 4卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Frequency offset (FO); Optical fiber communication; Orthogonal frequency division multiplexing (OFDM); Passive optical network (PON);
D O I：
10.1364/JOCN.4.000565
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
We propose a wide-range frequency offset estimation algorithm used in a direct detection orthogonal frequency division multiplexing passive optical network (DD-OFDM-PON) downstream system. Using this method, frequency offset is estimated according to the spectrum of the received DD-OFDM signal. The estimated frequency offset is used for frequency down-conversion in the digital domain to obtain the baseband OFDM signal. With this method, all data-bearing subcarriers should fall into the OFDM bandwidth after frequency down-conversion. The validity of the method is confirmed by an experiment with 20 Gb/s OFDM-PON downstream transmission.
引用
收藏
页码：565 / 570
页数：6
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