Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Comparison of Superposition Coding Schemes   There are two variants of superposition coding schemes. Cover's original
superposition coding scheme has code clouds of the identical shape, while
Bergmans's superposition coding scheme has code clouds of independently
generated shapes. These two schemes yield identical achievable rate regions in
several scenarios, such as the capacity region for degraded broadcast channels.
This paper shows that under the optimal maximum likelihood decoding, these two
superposition coding schemes can result in different rate regions. In
particular, it is shown that for the two-receiver broadcast channel, Cover's
superposition coding scheme can achieve rates strictly larger than Bergmans's
scheme.

20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th