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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 14 — Jul. 4, 2011
  • pp: 13503–13508

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

Xingwen Yi and Kun Qiu  »View Author Affiliations


Optics Express, Vol. 19, Issue 14, pp. 13503-13508 (2011)
http://dx.doi.org/10.1364/OE.19.013503


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Abstract

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 high-speed 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.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 21, 2011
Revised Manuscript: May 19, 2011
Manuscript Accepted: May 22, 2011
Published: June 28, 2011

Citation
Xingwen Yi and Kun Qiu, "Estimation and compensation of sample frequency offset in coherent optical OFDM systems," Opt. Express 19, 13503-13508 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-14-13503


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