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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 20851–20856

Investigation of PMD in direct-detection optical OFDM with zero padding

Xiang Li, Arokiaswami Alphones, Wen-De Zhong, and Changyuan Yu  »View Author Affiliations


Optics Express, Vol. 21, Issue 18, pp. 20851-20856 (2013)
http://dx.doi.org/10.1364/OE.21.020851


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Abstract

We investigate the polarization-mode dispersion (PMD) effect of zero padding OFDM (ZP-OFDM) in direct-detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems. We first study the conventional equalization method for ZP-OFDM. Then an equalization method based on sorted QR decomposition is proposed to further improve the performance. It is found that the performance improvement of ZP-OFDM is due to the frequency domain oversampling (FDO) induced inter-carrier interference (ICI). Numerical simulation results show that compared with cyclic prefix OFDM (CP-OFDM), ZP-OFDM has a significantly higher tolerance to PMD in DDO-OFDM systems when the channel spectral nulls occur at certain differential group delay (DGD) values.

© 2013 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 22, 2013
Revised Manuscript: July 15, 2013
Manuscript Accepted: August 12, 2013
Published: August 29, 2013

Citation
Xiang Li, Arokiaswami Alphones, Wen-De Zhong, and Changyuan Yu, "Investigation of PMD in direct-detection optical OFDM with zero padding," Opt. Express 21, 20851-20856 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-20851


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References

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