Abstract
This paper compares two approaches to reliable communication over fading channels using low-density parity check (LDPC) codes. The particular model considered is the block fading channel with independent channel realizations. The first approach uses a block interleaver to create independent sub-channels that are encoded using irregular LDPC codes with rates specified by the appropriate capacity values; this first approach uses a decision feedback structure wherein decoded data are used as pilots to estimate the channel prior to the next round of decoding. The second approach uses a combined graph describing both the channel and the code to iteratively estimate the channel and decode data. For comparable channels, it is shown that the decision-feedback approach provides better performance when a long delay is acceptable, while the iterative receiver provides better performance when more stringent delay constraints are imposed.
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© 2006 Springer-Verlag Berlin Heidelberg
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Jin, X., Li, T., Fuja, T.E., Collins, O.M. (2006). LDPC Codes for Fading Channels: Two Strategies. In: Fossorier, M.P.C., Imai, H., Lin, S., Poli, A. (eds) Applied Algebra, Algebraic Algorithms and Error-Correcting Codes. AAECC 2006. Lecture Notes in Computer Science, vol 3857. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11617983_23
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DOI: https://doi.org/10.1007/11617983_23
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-31423-3
Online ISBN: 978-3-540-31424-0
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