Simple and accurate design of low-density parity-check codes for multi-input multi-output systems

Jeong Hwan Shin, Kwangseok Noh, Wonjin Sung, Jun Heo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper we design an irregular low-density parity-check (LDPC) code for multiple-input multiple-output (MIMO) systems, using a simple extrinsic information transfer (EXIT) chart method. The MIMO systems considered are the optimal maximum a posteriori probability (MAP) detector and the suboptimal minimum mean square error soft-interference cancellation (MMSE-SIC) detector. The MIMO detector and the LDPC decoder exchange soft information and form a turbo iterative receiver. The EXIT charts are used to obtain the edge degree distribution of the irregular LDPC code which is optimized for the MIMO detector. It is shown that the performance of the designed LDPC code is better than that of conventional LDPC code which was optimized for either the Additive White Gaussian Noise (AWGN) channel or the MIMO channel without an explicit consideration of the given detector structure.

Original languageEnglish
Pages (from-to)923-936
Number of pages14
JournalWireless Personal Communications
Volume62
Issue number4
DOIs
Publication statusPublished - 2012 Feb

Keywords

  • EXIT chart
  • Iterative decoding
  • Low-density parity-check (LDPC) codes
  • Multi-input multi-output (MIMO) detection

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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