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Volume 29 Issue 9
Jan.  2011
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Wang Ji-kang, Zhou He-qin. Analysis and Design of Punctured LDPC[J]. Journal of Electronics & Information Technology, 2007, 29(9): 2149-2153. doi: 10.3724/SP.J.1146.2006.00065
Citation: Wang Ji-kang, Zhou He-qin. Analysis and Design of Punctured LDPC[J]. Journal of Electronics & Information Technology, 2007, 29(9): 2149-2153. doi: 10.3724/SP.J.1146.2006.00065

Analysis and Design of Punctured LDPC

doi: 10.3724/SP.J.1146.2006.00065 cstr: 32379.14.SP.J.1146.2006.00065
  • Received Date: 2006-01-13
  • Rev Recd Date: 2006-09-06
  • Publish Date: 2007-09-19
  • In Communication systems, code rates are usually adapted to different channel environment, while puncturing is an effective solution to this strategy. Based on Gaussian approximation, the message-passing decoding algorithm for punctured Low-Density Parity-Check (LDPC)codes on Additive White Gaussian Noise (AWGN) channel is analyzed, as well as the recursive function for message mean is derived. According to this function, a novel design approach is proposed for optimizing the puncturing distributions. Simulation results demonstrate that not only the message mean of message-passing decoder increases more quickly for punctured LDPC optimized by the proposed approach, but also the convergence rate of message-passing decoder is faster than that by traditional approaches.
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