TY - JOUR
T1 - On Secure NOMA Systems with Transmit Antenna Selection Schemes
AU - Lei, Hongjiang
AU - Zhang, Jianming
AU - Park, Ki Hong
AU - Xu, Peng
AU - Ansari, Imran Shafique
AU - Pan, Gaofeng
AU - Alomair, Basel
AU - Alouini, Mohamed Slim
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2017/8/9
Y1 - 2017/8/9
N2 - This paper investigates the secrecy performance of a two-user downlink non-orthogonal multiple access systems. Both single-input and single-output and multiple-input and single-output systems with different transmit antenna selection (TAS) strategies are considered. Depending on whether the base station has the global channel state information of both the main and wiretap channels, the exact closed-form expressions for the secrecy outage probability (SOP) with suboptimal antenna selection and optimal antenna selection schemes are obtained and compared with the traditional space-time transmission scheme. To obtain further insights, the asymptotic analysis of the SOP in high average channel power gains regime is presented and it is found that the secrecy diversity order for all the TAS schemes with fixed power allocation is zero. Furthermore, an effective power allocation scheme is proposed to obtain the non-zero diversity order with all the TAS schemes. Monte Carlo simulations are performed to verify the proposed analytical results.
AB - This paper investigates the secrecy performance of a two-user downlink non-orthogonal multiple access systems. Both single-input and single-output and multiple-input and single-output systems with different transmit antenna selection (TAS) strategies are considered. Depending on whether the base station has the global channel state information of both the main and wiretap channels, the exact closed-form expressions for the secrecy outage probability (SOP) with suboptimal antenna selection and optimal antenna selection schemes are obtained and compared with the traditional space-time transmission scheme. To obtain further insights, the asymptotic analysis of the SOP in high average channel power gains regime is presented and it is found that the secrecy diversity order for all the TAS schemes with fixed power allocation is zero. Furthermore, an effective power allocation scheme is proposed to obtain the non-zero diversity order with all the TAS schemes. Monte Carlo simulations are performed to verify the proposed analytical results.
KW - Non-orthogonal multiple access
KW - physical layer security
KW - secrecy outage probability
KW - transmit antenna selection
UR - http://www.scopus.com/inward/record.url?scp=85029009637&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2017.2737330
DO - 10.1109/ACCESS.2017.2737330
M3 - Article
AN - SCOPUS:85029009637
SN - 2169-3536
VL - 5
SP - 17450
EP - 17464
JO - IEEE Access
JF - IEEE Access
M1 - 8006199
ER -