상세정보
학술지
Distortion Mitigation in Multiband OFDM RoF Transmission Employing Blind Post Equalizer
- 발행일
- 201612
- 출처
- IEEE Photonics Technology Letters, v.28 no.23, pp.2708-2711
- ISSN
- 1041-1135
- 출판사
- IEEE
- 협약과제
- 16ZI1300, 광 기반 Compact Radio & Dense Digital 이동통신 기지국 핵심기술 개발, 이종현
- 초록
- 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 제안 키워드
- Adaptive equalizer, Input power, Linear distortion, MB-OFDM, Multiband OFDM, OFDM transmission, Power difference, Radio Frequency(RF), Radio-over-fiber (RoF) system, Training signal, blind adaptive