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Volume 26 Issue 10
Oct.  2004
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Xue Ying-jian, Xiang Hai-ge. LDPC Coded MIMO System Scheme[J]. Journal of Electronics & Information Technology, 2004, 26(10): 1580-1586.
Citation: Xue Ying-jian, Xiang Hai-ge. LDPC Coded MIMO System Scheme[J]. Journal of Electronics & Information Technology, 2004, 26(10): 1580-1586.

LDPC Coded MIMO System Scheme

  • Received Date: 2003-06-25
  • Rev Recd Date: 2003-10-27
  • Publish Date: 2004-10-19
  • In this paper, the performance of the LDPC coded MIMO system scheme is evaluated through numerical simulations, and according to the belief propagation decoding algorithm of LDPC codes, a combined iterative detection/decoding MAP algorithm based on the factor-graph representation is proposed. The system performance is analyzed under two transmitter encoding structures, namely the separate encoding structure and the combined encoding structure respectively. Simulation results show that LDPC codes can increase the effective diversity gain by utilizing both the space and the time diversity effects of the MIMO system, and the combined iterative detection/decoding algorithm results in different performance gain for the two transmitter encoding structures.
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  • Gallager R G. Low-density parity-check codes[J].IRE Trans. on Info. Theory.1962, 8(1):21-28[2]Gallager R G. Low-Density Parity-Check Codes. Cambridge, MA: MIT Press, 1963, chapter 3.[3]Chung S Y, Forney G D, Richardson T J, Urbanke R. On the design of low-density parity-check codes within 0.0045 dB of the Shannon limit. IEEE Comm. Letters, 2001, 5(2): 58-60.[4]Hochwald B M, Brink S T. Achieving near-capacity on a multiple-antenna channel. IEEE Trans.on Comm., 2003, COM-51(3): 389-399.[5]Foschini G J, Gans M. On the limits of wireless communication in a fading environment when using multiple antennas[J].Wireless Personal Comm.1998, 6(3):311-335[6]Lu B, Wang X, Narayanan K R. LDPC-based space-time coded OFDM systems over correlated fading channels: Performance analysis and receiver design. IEEE Trans. on Comm., 2002, COM50(1), 74-88.[7]Proakis J G. Digital Communications. Fourth Edition, New York: McGraw-Hill, 2001: 878-887.
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