Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multipath Channels of Bounded Capacity   The capacity of discrete-time, non-coherent, multipath fading channels is
considered. It is shown that if the delay spread is large in the sense that the
variances of the path gains do not decay faster than geometrically, then
capacity is bounded in the signal-to-noise ratio.

9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph