Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Artificial-Noise-Aided Secure Transmission in Wiretap Channels with
  Transmitter-Side Correlation   This work for the first time examines the impact of transmitter-side
correlation on the artificial-noise-aided secure transmission, based on which a
new power allocation strategy for artificial noise (AN) is devised for physical
layer security enhancement. Specifically, we design a correlation-based power
allocation (CPA) for AN, of which the optimality in terms of achieving the
minimum secrecy outage probability is analytically proved in the large system
regime with the number of transmit antennas approaching infinity. In order to
fully reveal the benefits of the CPA, we derive easy-to-evaluate expressions
for the secrecy outage probability achieved by the CPA. Our study demonstrates
that the CPA is nearly optimal and significantly outperforms the widely-used
uniform power allocation (UPA) even for a moderately small number of correlated
transmit antennas. Furthermore, our numerical results reveal a fundamental
difference between the CPA and UPA. That is when the number of correlated
transmit antennas increases, the secrecy outage probability of the CPA always
reduces while the secrecy outage probability of the UPA suffers from a
saturation point.

7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas