Estimation and compensation of sample frequency offset in coherent optical OFDM systems

被引：23

作者：

Yi, Xingwen ^{[1
]}

Qiu, Kun ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Commun & Informat Engn, Chengdu 611731, Sichuan, Peoples R China

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 14期

关键词：

TRANSMISSION;

D O I：

10.1364/OE.19.013503

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Coherent optical OFDM systems employ DAC at the transmitters and ADC at the receivers. The sample frequencies of DAC and ADC in such systems need to be synchronized, especially in the context of highspeed transmissions. This paper presents a channel model including the effect of the sample frequency offset, which adds an additional phase shift proportional to the subcarrier index. The sample frequency offset monitoring and the compensation method are discussed and verified in experiment. It is expected that the synchronization can be achieved by feeding the monitoring result back to the receiver oscillator. (C) 2011 Optical Society of America

引用

页码：13503 / 13508

页数：6

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