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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3708–3714

Complexity-reduced digital predistortion for subcarrier multiplexed radio over fiber systems transmitting sparse multi-band RF signals

Yinqing Pei, Kun Xu, Jianqiang Li, Anxu Zhang, Yitang Dai, Yuefeng Ji, and Jintong Lin  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 3708-3714 (2013)

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A novel multi-band digital predistortion (DPD) technique is proposed to linearize the subcarrier multiplexed radio-over-fiber (SCM-RoF) system transmitting sparse multi-band RF signal with large blank spectra between the constituent RF bands. DPD performs on the baseband signal of each individual RF band before up-conversion and RF combination. By disregarding the blank spectra, the processing bandwidth of the proposed DPD technique is greatly reduced, which is only determined by the baseband signal bandwidth of each individual RF band, rather than the entire bandwidth of the combined multi-band RF signal. Experimental demonstration is performed in a directly modulated SCM-RoF system transmitting two 64QAM modulated OFDM signals on 2.4GHz band and 3.6GHz band. Results show that the adjacent channel power (ACP) is suppressed by 15dB leading to significant improvement of the EVM performances of the signals on both of the two bands.

© 2013 OSA

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4230) Fiber optics and optical communications : Multiplexing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 10, 2012
Revised Manuscript: January 27, 2013
Manuscript Accepted: January 28, 2013
Published: February 6, 2013

Yinqing Pei, Kun Xu, Jianqiang Li, Anxu Zhang, Yitang Dai, Yuefeng Ji, and Jintong Lin, "Complexity-reduced digital predistortion for subcarrier multiplexed radio over fiber systems transmitting sparse multi-band RF signals," Opt. Express 21, 3708-3714 (2013)

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