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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 4 — Feb. 24, 2014
  • pp: 4649–4661

Experimental investigation on multi-dimensional digital predistortion for multi-band radio-over-fiber systems

Hao Chen, Jianqiang Li, Kun Xu, Yinqing Pei, Yitang Dai, Feifei Yin, and Jintong Lin  »View Author Affiliations

Optics Express, Vol. 22, Issue 4, pp. 4649-4661 (2014)

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The recently-proposed multi-dimensional digital predistortion (DPD) technique is experimentally investigated in terms of nonlinearity order, memory length, oversampling rate, digital-to-analog conversion resolution, carrier frequency dependence and RF input power tolerance, in both directly-modulated and externally-modulated multi-band radio-over-fiber (RoF) systems. Similar characteristics of the multi-dimensional digital predistorter are identified in directly-modulated and externally-modulated RoF systems. The experimental results suggest implementing a memory-free multi-dimensional digital predistorter involving nonlinearity orders up to 5 at 2 × oversampling rate for practical multi-band RoF systems. Using the suggested parameters, the multi-dimensional DPD is able to improve the RF input power tolerance by greater than 3dB for each band in a two-band RoF system, indicating an enhancement of RF power transmitting efficiency.

© 2014 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4230) Fiber optics and optical communications : Multiplexing
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Optical Communications

Original Manuscript: December 19, 2013
Revised Manuscript: February 13, 2014
Manuscript Accepted: February 14, 2014
Published: February 20, 2014

Hao Chen, Jianqiang Li, Kun Xu, Yinqing Pei, Yitang Dai, Feifei Yin, and Jintong Lin, "Experimental investigation on multi-dimensional digital predistortion for multi-band radio-over-fiber systems," Opt. Express 22, 4649-4661 (2014)

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