title: Multi-dimensional crest factor reduction and digital predistortion for multi-band radio-over-fiber links.
abstract: 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.
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Li
authors.forename: Chunjing
authors.initials: C
authors.lastname: Yin
authors.forename: Kun
authors.initials: K
authors.lastname: Xu
authors.forename: Yitang
authors.initials: Y
authors.lastname: Dai
authors.forename: Feifei
authors.initials: F
authors.lastname: Yin