H-ARQ Techniques for Wireless Systems with Punctured Non-Binary LDPC as FEC Code

This paper presents the H-ARQ techniques comparison for OFDM systems with a new family of non-binary LDPC codes which has been developed within the EU FP7 DAVINCI project. The punctured NB-LDPC codes have been used in a simulated model of the transmission system. The link level performance has been evaluated in terms of spectral efficiency, codeword error rate and average number of retransmissions. The NB-LDPC codes can be easily and effective implemented with different methods of the retransmission needed if correct decoding of a codeword failed. Here the Optimal Symbol Selection method is proposed as a Chase Combining technique.

• Ł. Kiedrowski
• H. Gierszal
• W. Hołubowicz

• H-ARQ
• LDPC
• Non-Binary
• Punctured Codes.

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