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Turbo Coded OFDM Scheme for a High-Speed Power Line Communication

고속 전력선 통신을 위한 터보 부호화된 OFDM

  • Kim, Jin-Young (Department of Wireless Communication Engineering, Kwangwoon University) ;
  • Koo, Sung-Wan (Department of Wireless Communication Engineering, Kwangwoon University)
  • 김진영 (광운대학교 전파공학과) ;
  • 구성완 (광운대학교 전파공학과)
  • Published : 2010.01.31

Abstract

In this paper, performance of a turbo-coded OFDM system is analyzed and simulated in a power line communication channel. Since the power line communication system typically operates in a hostile environment, turbo code has been employed to enhance reliability of transmitted data. The performance is evaluated in terms of bit error probability. As turbo decoding algorithms, MAP (maximum a posteriori), Max-Log-MAP, and SOVA (soft decision viterbi output) algorithms are chosen and their performances are compared. From simulation results, it is demonstrated that Max-Log-MAP algorithm is promising in terms of performance and complexity. It is shown that performance is improved 3dB by increasing the number of iterations, 2 to 8, and interleaver length of a turbo encoder, 100 to 5000. The results in this paper can be applied to OFDM-based high-speed power line communication systems.

Keywords

OFDM;Power Line;Communication;Turbo Coding

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