Low-density parity-check (LDPC) coded OFDM systems

H. Futaki, T. Ohtsuki

Research output: Contribution to journalConference articlepeer-review

41 Citations (Scopus)


Orthogonal Frequency Division Multiplexing (OFDM) is a very attractive technique for high-bit-rate data transmission in a multipath fading environment that causes intersymbol interference (ISI). There are many error-correcting codes applied to OFDM, convolutional codes, Reed-Solomon codes, Turbo codes, and so on. Recently, low-density parity-check (LDPC) codes have attracted much attention particularly in the field of coding theory. LDPC codes were proposed by Gallager in 1962 and the performance is very close to the Shannon limit with practical decoding complexity like Turbo codes. We propose LDPC coded OFDM (LDPC-COFDM) systems to improve the bit error rate (BER) of OFDM. We show that the BER of the LDPC-COFDM is worse than that of the TCOFDM on an AWGN channel, while that of the LDPC-COFDM is better than that of the Turbo-coded OFDM (TCOFDM) on a frequency-selective fading channel.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number54ND
Publication statusPublished - 2001 Jan 1
Externally publishedYes
EventIEEE 54th Vehicular Technology Conference (VTC FALL 2001) - Atlantic City, NJ, United States
Duration: 2001 Oct 72001 Oct 11


  • Low-density parity-check code
  • Turbo code

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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