Clip-and-Filter-Based Crest Factor Reduction and Digital Predistortion for WLAN-Over-Fiber Links

Author

Yongjun Zhang ; Jianqiang Li ; Hao Chen ; Chunjing Yin ; Yitang Dai ; Feifei Yin ; Kun Xu

Author_Institution

State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

Volume

26

Issue

23

fYear

2014

fDate

Dec.1, 1 2014

Firstpage

2315

Lastpage

2318

Abstract

In this letter, we investigate the combined use of crest factor reduction and digital predistortion (DPD) as an effective method for increasing the performance in radio-over-fiber (RoF)-based downlinks. The experimental results show that combining the two techniques further improves the performance as compared with the case solely using DPD in terms of error vector magnitude (EVM) and adjacent channel power ratio (ACPR) for both directly modulated and externally modulated RoF links. Given a threshold in EVM or ACPR, the RF power transmit efficiency is also further enhanced.

Keywords

optical communication equipment; optical distortion; optical fibre LAN; optical fibre filters; optical links; optical modulation; radio-over-fibre; wireless LAN; RF power transmission efficiency enhancement; WLAN-over-fiber links; adjacent channel power ratio; clip-and-filter-based crest factor reduction; digital predistortion; error vector magnitude; optical modulation; radio-over-fibe-based downlinks; Constellation diagram; Optical attenuators; Optical fiber amplifiers; Optical fiber communication; Peak to average power ratio; Predistortion; Radio frequency; Crest factor reduction; digital predistortion; nonlinearity; radio-over-fiber;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2354535

Filename

6891208