Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Carnot machine-based massive MIMO communication capacity modeling and
  performance analysis   Similar to the energy flowing process in traditional heat engines,
information could be considered to flow in the communication systems with the
form of energy and entropy. Combining the thermodynamic Carnot machine and the
classical Shannon information theory, a generalized thermodynamic MIMO
(multiple input multiple outputs) communication system is established to
analyze the channel capacity using forward error correction codes. Based on the
concepts of freedom and entropy in the communication system, the generalized
channel capacity is proposed under the thermodynamic theory. Furthermore, the
relationships between the proposed channel capacity and the noise freedom and
coding overhead are derived and simulated. Simulation results verify the
proposed channel capacity is coincident with the classical channel capacity.

14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ