Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A General Achievable Rate Region for Multiple-Access Relay Channels and
  Some Certain Capacity Theorems   In this paper, we obtain a general achievable rate region and some certain
capacity theorems for multiple-access relay channel (MARC), using decode and
forward (DAF) strategy at the relay, superposition coding at the transmitters.
Our general rate region (i) generalizes the achievability part of Slepian-Wolf
multiple-access capacity theorem to the MARC, (ii) extends the Cover-El Gamal
best achievable rate for the relay channel with DAF strategy to the MARC, (iii)
gives the Kramer-Wijengaarden rate region for the MARC, (iv) meets max-flow
min-cut upper bound and leads to the capacity regions of some important classes
of the MARC.

9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess