Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gradient Ascent Algorithm for Enhancing Secrecy Rate in Wireless
  Communications for Smart Grid   The emerging Internet of Things (IoT) and bidirectional communications in
smart grid are expected to improve smart grid capabilities and electricity
management. Because of massive number of IoT devices in smart grid, size of the
data to be transmitted increases, that demands a high data rate to meet the
real-time smart grid communications requirements. Sub-6 GHz, millimeter-wave
(mmWave) technologies, and massive multiple-input multiple-output (MIMO)
technologies can meet high data rate demands. However, IoT enabled smart grid
is still subject to various security challenges such as eavesdropping, where
attackers attempt to overhear the transmitted signals and the jamming attack,
where the attacker perturbs the received signals at the receiver. In this
paper, our goal is to investigate jamming and eavesdropping attacks while
improving secrecy capacity for smart grid communications. Specifically, we
propose to employ a hybrid beamforming design for wireless communications in
smart energy grid. In previous works, the secrecy capacity is increased by
randomly augmenting the source power or setting the system combiners. Unlike
state-of-the-art, we design and evaluate the Gradient Ascent algorithm to
search for the best combiners/waveform that maximizes the secrecy capacity in
smart grid communications. We also study two different optimization scenarios
by considering both fixed and variable transmit power. Numerical results are
used for performance evaluation and supporting our formal analysis.

35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph