Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Capacity of the Gaussian Relay Channel with Correlated Noises to Within
  a Constant Gap   This paper studies the relaying strategies and the approximate capacity of
the classic three-node Gaussian relay channel, but where the noises at the
relay and at the destination are correlated. It is shown that the capacity of
such a relay channel can be achieved to within a constant gap of $\hf \log_2 3
=0.7925$ bits using a modified version of the noisy network coding strategy,
where the quantization level at the relay is set in a correlation dependent
way. As a corollary, this result establishes that the conventional
compress-and-forward scheme also achieves to within a constant gap to the
capacity. In contrast, the decode-and-forward and the single-tap
amplify-and-forward relaying strategies can have an infinite gap to capacity in
the regime where the noises at the relay and at the destination are highly
correlated, and the gain of the relay-to-destination link goes to infinity.

4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph