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Proceedings Paper

Behavioral modeling and digital compensation of nonlinearity in DFB lasers for multi-band directly modulated radio-over-fiber systems
Author(s): Jianqiang Li; Chunjing Yin; Hao Chen; Feifei Yin; Yitang Dai; Kun Xu
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Paper Abstract

The envisioned C-RAN concept in wireless communication sector replies on distributed antenna systems (DAS) which consist of a central unit (CU), multiple remote antenna units (RAUs) and the fronthaul links between them. As the legacy and emerging wireless communication standards will coexist for a long time, the fronthaul links are preferred to carry multi-band multi-standard wireless signals. Directly-modulated radio-over-fiber (ROF) links can serve as a lowcost option to make fronthaul connections conveying multi-band wireless signals. However, directly-modulated radioover- fiber (ROF) systems often suffer from inherent nonlinearities from directly-modulated lasers. Unlike ROF systems working at the single-band mode, the modulation nonlinearities in multi-band ROF systems can result in both in-band and cross-band nonlinear distortions. In order to address this issue, we have recently investigated the multi-band nonlinear behavior of directly-modulated DFB lasers based on multi-dimensional memory polynomial model. Based on this model, an efficient multi-dimensional baseband digital predistortion technique was developed and experimentally demonstrated for linearization of multi-band directly-modulated ROF systems.

Paper Details

Date Published: 3 December 2014
PDF: 11 pages
Proc. SPIE 9267, Semiconductor Lasers and Applications VI, 92670K (3 December 2014); doi: 10.1117/12.2069888
Show Author Affiliations
Jianqiang Li, Beijing Univ. of Posts and Telecommunications (China)
Chunjing Yin, Beijing Univ. of Posts and Telecommunications (China)
Hao Chen, Beijing Univ. of Posts and Telecommunications (China)
Feifei Yin, Beijing Univ. of Posts and Telecommunications (China)
Yitang Dai, Beijing Univ. of Posts and Telecommunications (China)
Kun Xu, Beijing Univ. of Posts and Telecommunications (China)

Published in SPIE Proceedings Vol. 9267:
Semiconductor Lasers and Applications VI
Ninghua Zhu; Werner H. Hofmann, Editor(s)

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