Low-density parity-check (LDPC) coded MIMO systems with iterative turbo decoding

Hisashi Futaki, Tomoaki Ohtsuki

研究成果: Conference article査読

8 被引用数 (Scopus)


Transmit diversity schemes have been studied for high spectral-efficiency and high bit-rate transmission, such as multi-input multi-output (MIMO) systems. In the MIMO systems, forward error correction coding is essential for high quality communications. Recently, low-density parity-check (LDPC) codes have attracted much attention as good error correcting codes like turbo codes. LDPC codes have been applied to the MIMO systems, where we refer to the system as the MIMO-LDPC. In this paper, we propose a new MIMO-LDPC system with iterative turbo decoding (MIMO-LDPC-TD) using two LDPC encoders and two LDPC decoders to improve the performance of the MIMO-LDPC. Since each decoder in the MIMO-LDPC-TD is smaller than that in the MIMO-LDPC, the decoding complexity at each decoder in the MIMO-LDPC-TD is less than that in the MIMO-LDPC. We also compare the performance of the MIMO-LDPC with that of the turbo coded MIMO systems (MIMO-turbo) on flat Rayleigh fading channels. We show that the MIMO-LDPC-TD can achieve the good error rate performance with reduced decoding complexity at each decoder on a flat Rayleigh fading channel, particularly on a slow fading channel. We also show that the MIMO-LDPC can achieve the better error rate performance than the MIMO-turbo on a fast Rayleigh fading channel.

ジャーナルIEEE Vehicular Technology Conference
出版ステータスPublished - 2003 12 1
イベント2003 IEEE 58th Vehicular Technology Conference, VTC2003-Fall - Orlando, FL, United States
継続期間: 2003 10 62003 10 9

ASJC Scopus subject areas

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

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