Proceedings of the Korean Society of Broadcast Engineers Conference (한국방송∙미디어공학회:학술대회논문집)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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On the Performance of an Orthogonal Frequency Division Multiplexing System in a Mobile Radio Channel

이동 통신 채널에서 직교 주파수 분할 다중 시스템의 성능 연구

  • 김윤희 (한국과학기술원 전기 및 전자공학과) ;
  • 송익호 (한국과학기술원 전기 및 전자공학과) ;
  • 김상우 (한국과학기술원 전기 및 전자공학과) ;
  • 방영조 (한국과학기술원 전기 및 전자공학과)
  • Published : 1996.06.01
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Abstract

In this paper, we first analyze the influence of interference due to the time variation and delay spread of the mobile channel on an orthogonal frequency division multiplexing (OFDM) system. With the result, we obtain the bit error rate performance of the 16-QAM OFDM system. Second, we investigate the performance of the Reed-Solomon (RS) coded 16-QAM OFDM system when the number of subcarriers varies. In the investigation, we assume that the information transmission rate and the total bandwidth expansion due to coding, guard interval, and the number of subcarriers are fixed. Under this condition, it is observed that there are optimum numbers of subcarriers that minimize the post decoding symbol error probability of RS code for various channel states.

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