Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1532984 | Optics Communications | 2016 | 6 Pages |
Abstract
In future broadband cloud radio access networks (C-RAN), front-haul transmission systems play a significant role in performance and cost of C-RAN. Broadband and high linearity radio over fiber (RoF) transmission systems are considered a promising solution for the front-haul. Digital linearization is one possible solution for RoF front-haul. In this paper, we investigate RF domain digital predistortion (DPD) linearization for broadband RoF front-haul. The implemented DPD is first investigated in 2.4Â GHz WiFi over fiber transmission systems at 36Â Mb/s, and more than 8-dB and 5.6-dB improvements of error vector magnitude (EVM) are achieved in back to back (BTB) and after 10Â km single mode fiber (SMF) transmission. Further, both WiFi and ultra wide band (UWB) wireless signals are transmitted together, in which the DPD has linearization bandwidth of 2.4Â GHz. It is shown that the implemented DPD leads to EVM improvements of 4.5-dB (BTB) and 3.1-dB (10Â km SMF) for the WiFi signal, and 4.6-dB (BTB) and 4-dB (10Â km SMF) for the broadband UWB signal.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xiupu Zhang, Taijun Liu, Dongya Shen,