Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Benefit of Thresholding in LP Decoding of LDPC Codes   Consider data transmission over a binary-input additive white Gaussian noise
channel using a binary low-density parity-check code. We ask the following
question: Given a decoder that takes log-likelihood ratios as input, does it
help to modify the log-likelihood ratios before decoding? If we use an optimal
decoder then it is clear that modifying the log-likelihoods cannot possibly
help the decoder's performance, and so the answer is "no." However, for a
suboptimal decoder like the linear programming decoder, the answer might be
"yes": In this paper we prove that for certain interesting classes of
low-density parity-check codes and large enough SNRs, it is advantageous to
truncate the log-likelihood ratios before passing them to the linear
programming decoder.

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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio