Novel OFDM frame synchronization in multi-user environments

  • Authors:

  • Eun Cheol Kim;Jae Sang Cha;Jin Young Kim;Young Dae Lee;Yong Soon Im;Chanwoo Moon;Jeong Jin Kang

  • Affiliations:

  • Kwangwoon University, Nowon-Gu, Seoul, Korea;Seoul National University of Technology, Nowon-Gu, Seoul, Korea;Kwangwoon University, Nowon-Gu, Seoul, Korea;IWBC, Songpa-Gu, Seoul, Korea;KookJe College, Peongtaek-Si, Gyeong Gi-Do, Korea;Kookmin University, Seongbuk-Gu, Seoul, Korea;DongSeoul College, Sujeong-Gu, Gyunggi, Korea

  • Venue:
  • Proceedings of the 2009 International Conference on Hybrid Information Technology
  • Year:
  • 2009

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Abstract

In this paper, we propose a novel frame synchronization algorithm for an orthogonal frequency division multiplexing (OFDM) system in multi-user environments. In order to enhance the synchronization performance, we add a repeated orthgonal Gold sequence (ROGS) directly to OFDM signals in the time domain. The power level of a ROGS needs to be low engough in order not to affect a normal operation of the OFDM systems. Frame synchronization can be achieved successfully over Rayleigh fading channel interfereed by impulsive noise owing to good auto and cross-correlation properties of the ROGS.