Low-Density Parity-Check (LDPC) coded OFDM systems: Bit error rate and the number of decoding iterations

Hisashi Futaki, Tomoaki Ohtsuki

Research output: Contribution to journalLetter

Abstract

In this letter, we propose the Low-Density Parity-Check (LDPC) coded Orthogonal Frequency Division Multiplexing (OFDM) systems to improve the error rate performance of OFDM. We also evaluate the iterative decoding performance on both an AWGN and a frequency-selective fading channels. We show that when the energy per information bit to the noise power spectral density ratio Eb/N0 is not small, the LDPC coded OFDM (LDPC-COFDM) systems have the good error rate performance with a small number of iterations. We also show that when the Eb/N0 is small, the BER of the LDPC-COFDM systems is worse than that of the Turbo coded OFDM (TCOFDM) systems, while when the Eb/N0 is not small, the BER of the LDPC-COFDM systems is better with a small number of iterations.

Original languageEnglish
Pages (from-to)3310-3316
Number of pages7
JournalIEICE Transactions on Communications
VolumeE86-B
Issue number11
Publication statusPublished - 2003 Nov
Externally publishedYes

Keywords

  • Belief propagation algorithm
  • Low-density parity-check codes
  • OFDM
  • Turbo codes

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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