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Distortion Mitigation in Multiband OFDM RoF Transmission Employing Blind Post Equalizer
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- Authors
- Hyoung Joon Park, Sun-Young Jung, Dong Woo Kwon, Seung-Hyun Cho, Hwan Seok Chung, Jong Hyun Lee, Sang-Kook Han
- Issue Date
- 2016-12
- Citation
- IEEE Photonics Technology Letters, v.28, no.23, pp.2708-2711
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We propose and experimentally demonstrate a blind adaptive equalizer for a multiband (MB) orthogonal frequency-division multiplexing (OFDM) radio-over-fiber (RoF) system. The proposed equalizer adaptively decreases nonlinear and linear distortion, which might lead to serious signal degradation in MB OFDM transmission, without the use of a training signal. Instead of a training signal, error vector magnitude (EVM) and the power difference between the signal and the third-order intermodulation distortion components were observed in the equalizer. Therefore, the performance enhancement of MB OFDM transmission was experimentally verified in terms of EVM from 5.52% to 2.75% by mitigation of distortion. Consequently, the dynamic range of radio frequency input power was improved when the proposed equalizer was employed in an MB OFDM RoF system without increasing system overhead.
- KSP Keywords
- Adaptive equalizer, Input power, Linear distortion, MB-OFDM, Multiband OFDM, OFDM transmission, Power difference, Radio-frequency, Radio-over-fiber (RoF) system, Training signal, blind adaptive