Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Degradation of OFDM Signal Performance by Chromatic Dispersion in a Several 10 Gbit/s Mobile Front-haul Link

수 10 Gbit/s 모바일 프론트홀 링크에서 색분산에 의한 OFDM 신호 전송성능 열화 분석

  • Won, Yong-Yuk (Dept. of Electronics Engineering, Myongji University) ;
  • Seo, Dongsun (Dept. of Electronics Engineering, Myongji University)
  • Received : 2016.02.06
  • Accepted : 2016.02.22
  • Published : 2016.03.31
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Abstract

In this paper, an inter-orthogonal frequency division multiplexing (OFDM) sub-carrier distortion due to fiber chromatic dispersion is investigated. The fiber chromatic dispersion induces phase difference among OFDM sub-carriers, resulting in non-symmetric peak to average power ratio (PAPR) inducing inter-OFDM distortion. Experiments to confirm the fiber dispersion are performed in a direct-detection optical front-haul link. Quadrature phase shift keying (QPSK) encoded OFDM symbols at 25 Gbit/s are transmitted over 100 km fiber and the resulting error vector magnitude (EVM) of 40 % is observed.

본 논문에서는 광섬유 분산에 의한 직교 주파수 분할 다중방식(OFDM: orthogonal frequency division multiplexing)의 부 반송파 신호왜곡에 대해 조사하였다. 광섬유 색 분산은 OFDM 신호 간의 위상차를 발생시키고, 이는 OFDM 신호 왜곡을 유기하는 비대칭 첨두전력대 평균전력 비율을 유기한다. 광섬유 분산의 영향을 확인하기 위한 실험은 직접검출 광 모바일 프론트홀 시스템에서 수행하였다. 4 Gbit/s의 QPSK-OFDM 심볼의 경우, 100 km 전송에서 EVM이 40 %에 도달함을 확인하였다.

Keywords

References

  1. J. Zhang, Y. Jianjun, F. Li, X. Li, J. Xiao, and G.-K. Chang, "Demonstration of 24-Gb/s carrier-less amplitude and phase modulation (CAP) 64QAM radio-over-fiber system over 40-GHz Mm-wave fiber-wireless transmission," in Proceedings of Optical Fiber Communications Conference and Exibition (San Francisco, 2014), 1-3 (2014).
  2. C. Lei, M. Chen, H. Chen, S. Yang, Y. Yu, and S. Xie, "1-Tb/s WDM-OFDM-PON System With Subband Access Scheme and Flexible Subcarrier-Level Bandwidth Allocation," IEEE Photonics Journal, 5, 7900208 (2013). https://doi.org/10.1109/JPHOT.2013.2238617
  3. T. Takahara, T. Tanaka, M. Nishihara, Y. Kai, L. Li, Z. Tao, J. C. Rasmussen, "Discrete Multi-Tone for 100 Gb/s optical access networks," in Proceedings of Optical Fiber Communications Conference and Exibition (San Francisco, 2014), 1-3 (2014).
  4. Q. W. Zhang, E. Hugues-Salas, Y. Ling, H.B. Zhang, R.P. Giddings, M. Wang, and J.M. Tang, "17.125Gb/s over 25km transmissions of real-time dual-band optical OFDM signals modulated by 1GHz RSOAs," in Proceedings of Optical Fiber Communications Conference and Exibition (San Francisco, 2014), 1-3 (2014).
  5. J.-M. Joo, M.-K. Hong, D.-T. Pham, and S.-K. Han, "20-Gb/s AMO OFDM Transmission Over 20-km Bidirectional Link by Separate I/Q Baseband Delivery Using Remotely Fed 1-GHz RSOAs," J. Lightw. Technol., 30, 2661-2667 (2012). https://doi.org/10.1109/JLT.2012.2205219