Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observations on the Angular Statistics of the Indoor Sub-THz Radio
  Channel at 158 GHz   This paper presents selected results from a channel measurement campaign
conducted in a shopping mall scenario at 158 GHz. The focus is on the
statistical analysis of the collected measurement data in terms of directional
channel gain. Although most power is received from the line-of-sight (LOS)
direction, significant multipaths arrive from all measured azimuth directions.
The median of the sorted directional channel gain can be approximated by a
linear curve showing an offset of about 10 dB with respect to the LOS
direction.

22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con