Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intelligent Reflecting Surface-induced Randomness for mmWave Key
  Generation   Secret key generation in physical layer security exploits the unpredictable
random nature of wireless channels. However, the millimeter wave (mmWave)
channels have limited multipath and may not be Gaussian distributed. In this
paper, for mmWave secret key generation of physical layer security, we use
intelligent reflecting surface (IRS) to produce randomness and induce
artificial Rayleigh fading directly in the wireless environments. We first
formulate the model of IRS-assisted key generation in mmWave environments. The
IRS-assisted reflection channel varies according to the IRS weights' variation
and induces randomness. When considering the IRS weights are continuous and
discrete uniformly distributed, we find that the reflection channel variance is
equal to the number of IRS elements. Besides, we prove that the magnitude and
phase are Rayleigh and uniformly distributed when the weights are continuously
and discretely distributed with more than one quantization bit. With the
simulation results verifying the analytical results, this work explains the
mathematical principles behind the IRS-assisted physical layer security secret
key generation and lays a foundation for future mmWave key generation
evaluation and optimization of channel randomness.

30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph