CLC number: TN929.5
On-line Access: 2017-04-12
Received: 2015-12-06
Revision Accepted: 2016-02-24
Crosschecked: 2017-03-14
Cited: 1
Clicked: 7364
Hui Zhao, You-yu Tan, Gao-feng Pan, Yun-fei Chen. Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information[J]. Frontiers of Information Technology & Electronic Engineering, 2017, 18(4): 578-590.
@article{title="Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information",
author="Hui Zhao, You-yu Tan, Gao-feng Pan, Yun-fei Chen",
journal="Frontiers of Information Technology & Electronic Engineering",
volume="18",
number="4",
pages="578-590",
year="2017",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.1500430"
}
%0 Journal Article
%T Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information
%A Hui Zhao
%A You-yu Tan
%A Gao-feng Pan
%A Yun-fei Chen
%J Frontiers of Information Technology & Electronic Engineering
%V 18
%N 4
%P 578-590
%@ 2095-9184
%D 2017
%I Zhejiang University Press & Springer
%DOI 10.1631/FITEE.1500430
TY - JOUR
T1 - Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information
A1 - Hui Zhao
A1 - You-yu Tan
A1 - Gao-feng Pan
A1 - Yun-fei Chen
J0 - Frontiers of Information Technology & Electronic Engineering
VL - 18
IS - 4
SP - 578
EP - 590
%@ 2095-9184
Y1 - 2017
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/FITEE.1500430
Abstract: This paper investigates the secrecy performance of maximal ratio combining (MRC) and selection combining (SC) with imperfect channel state information (CSI) in the physical layer. In a single-input multiple-output (SIMO) wiretap channel, a source transmits confidential messages to the destination equipped with M antennas using the MRC/SC scheme to process the received multiple signals. An eavesdropper equipped with N antennas also adopts the MRC/SC scheme to promote successful eavesdropping. We derive the exact and asymptotic closed-form expressions for the ergodic secrecy capacity (ESC) in two cases: (1) MRC with weighting errors, and (2) SC with outdated CSI. Moreover, two important indicators, namely high signal-to-noise ratio (SNR) slope and high SNR power offset, which govern ESC at the high SNR region, are derived. Finally, simulations are conducted to validate the accuracy of our proposed analytical models. Results indicate that ESC rises with the increase of the number of antennas and the received SNR at the destination, and fades with the increase of those at the eavesdropper. Another finding is that the high SNR slope is constant, while the high SNR power offset is correlated with the number of antennas at both the destination and the eavesdropper.
This paper investigated the secrecy capacity of an SIMO system with imperfect CSI for both MRC and SC schemes. The analysis of the ergodic secrecy capacity was performed for two cases: 1) MRC with weighting errors and 2) SC with outdated CSI. Simulations were provided to validate their analysis and offer further insights.
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