Title :
Secrecy Outage Analysis of Multiuser Diversity With Unequal Average SNR in Transmit Antenna Selection Systems
Author :
Yujia Hu ; Xiaofeng Tao
Author_Institution :
Nat. Eng. Lab. for Mobile Network Security, Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This letter exploits multiuser diversity to enhance the physical layer security in transmit antenna selection systems. Since fading channels among different users are nonidentically distributed, new expressions of the exact and asymptotic secrecy outage probability are derived in an accumulate way. Also, an efficient closed-form derivation rather than a numerical root-finding is presented to evaluate the ε-outage secrecy capacity. Simulations are provided to verify our analysis and show that 1) the number of users has a great impact on secrecy performance; 2) the multiuser diversity should be exploited appropriately considering the statistics of the legitimate users and the eavesdropper.
Keywords :
diversity reception; fading channels; multiuser channels; telecommunication network reliability; telecommunication security; transmitting antennas; ε-outage secrecy capacity; exact asymptotic secrecy outage probability; fading channels; multiuser diversity; numerical root finding; physical layer security; transmit antenna selection systems; unequal average SNR; Diversity reception; Fading; MIMO; Niobium; Numerical models; Signal to noise ratio; Transmitting antennas; Multiuser diversity; Physical layer security; Transmit antenna selection; multiuser diversity; transmit antenna selection;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2391257
