Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Line-of-Sight MIMO via Reflection From a Smooth Surface   We provide a deterministic channel model for a scenario where wireless
connectivity is established through a reflection from a planar smooth surface
of an infinite extent. The developed model is rigorously built upon the physics
of wave propagation, and is as precise as tight are the unboundedness and
smoothness assumptions on the surface. This model allows establishing that
line-of-sight spatial multiplexing can take place via reflection off an
electrically large surface, a situation of high interest for mmWave and
terahertz frequencies.

30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc