Multi-dimensional crest factor reduction and digital predistortion for multi-band radio-over-fiber links

Multi-dimensional crest factor reduction and digital predistortion for multi-band radio-over-fiber links

A multi-dimensional crest factor reduction (MD-CFR) technique is proposed to improve the performance and efficiency of multi-band radio-over-fiber (RoF) links. Cooperating with multi-dimensional digital predistortion (MD-DPD), MD-CFR increases the performance of both directly-modulated and externall...

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Veröffentlicht in:Optics express 2014-08, Vol.22 (17), p.20982-20993
Hauptverfasser: Chen, Hao, Li, Jianqiang, Yin, Chunjing, Xu, Kun, Dai, Yitang, Yin, Feifei
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container_end_page 20993
container_issue 17
container_start_page 20982
container_title Optics express
container_volume 22
creator Chen, Hao
Li, Jianqiang
Yin, Chunjing
Xu, Kun
Dai, Yitang
Yin, Feifei
description A multi-dimensional crest factor reduction (MD-CFR) technique is proposed to improve the performance and efficiency of multi-band radio-over-fiber (RoF) links. Cooperating with multi-dimensional digital predistortion (MD-DPD), MD-CFR increases the performance of both directly-modulated and externally-modulated RoF links, in terms of error vector magnitude (EVM) and adjacent channel power ratio (ACPR). For directly-modulated RoF link, more than 5 dB output ACPR reduction is obtained, output EVMs are reduced from 11.83% and 12.47% to 7.51% and 7.26% for two bands respectively, while only a slight improvement to 11.58% and 10.78% is obtained solely using MD-DPD. Similar results are achieved in externally-modulated RoF link. Given a threshold in EVM or ACPR, the RF power transmit efficiency is also further enhanced.
doi_str_mv 10.1364/OE.22.020982
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title Multi-dimensional crest factor reduction and digital predistortion for multi-band radio-over-fiber links
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