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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 20 — Sep. 27, 2010
  • pp: 21308–21314

Transmitter IQ mismatch compensation in coherent optical OFDM systems using pilot signals

Wonzoo Chung  »View Author Affiliations


Optics Express, Vol. 18, Issue 20, pp. 21308-21314 (2010)
http://dx.doi.org/10.1364/OE.18.021308


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Abstract

Transmitter in-phase/quadrature (IQ) mismatch in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems is difficult to mitigate at the receiver using conventional time domain methods such as the Gram-Schmidt orthogonalization procedure, particularly in the presence of channel distortion. In this paper, we present a scheme that mitigates both transmitter IQ mismatch and channel distortion. We propose a pilot structure to estimate both channel and IQ mismatch, and develop a minimum mean square error compensation method. Numerical results show that the proposed method is effective in reducing transmitter IQ mismatch for a CO-OFDM system.

© 2010 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 12, 2010
Revised Manuscript: September 14, 2010
Manuscript Accepted: September 17, 2010
Published: September 22, 2010

Citation
Wonzoo Chung, "Transmitter IQ mismatch compensation in coherent optical OFDM systems using pilot signals," Opt. Express 18, 21308-21314 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-20-21308


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References

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