Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rate-Compatible Protograph-based LDPC Codes for Inter-Symbol
  Interference Channels   This letter produces a family of rate-compatible protograph-based LDPC codes
approaching the independent and uniformly distributed (i.u.d.) capacity of
inter-symbol interference (ISI) channels. This problem is highly nontrivial due
to the joint design of structured (protograph-based) LDPC codes and the state
structure of ISI channels. We describe a method to design nested high-rate
protograph codes by adding variable nodes to the protograph of a lower rate
code. We then design a family of rate-compatible protograph codes using the
extension method. The resulting protograph codes have iterative decoding
thresholds close to the i.u.d. capacity. Our results are supported by numerical
simulations.

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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an