Title :
On the Finite-SNR Diversity-Multiplexing Tradeoff of Zero-Forcing Transmit Scheme under Secrecy Constraint
Author :
Rezki, Zouheir ; Alouini, Mohamed-Slim
Author_Institution :
Phys. Sci. & Eng. (PSE) Div., King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
Abstract :
In this paper, we address the finite Signal-to-Noise Ratio (SNR) Diversity-Multiplexing Tradeoff (DMT) of the Multiple Input Multiple Output (MIMO) wiretap channel, where a Zero-Forcing (ZF) transmit scheme, that intends to send the secret information in the orthogonal space of the eavesdropper channel, is used. First, we introduce the secret multiplexing gain at finite-SNR that generalizes the definition at high-SNR. Then, we provide upper and lower bounds on the outage probability under secrecy constraint, from which secret diversity gain estimates of ZF are derived. Through asymptotic analysis, we show that the upper bound underestimates the secret diversity gain, whereas the lower bound is tight with respect to secure DMT at high-SNR.
Keywords :
MIMO communication; diversity reception; multiplexing; probability; signal processing; telecommunication security; wireless channels; DMT security; asymptotic analysis; eavesdropper channel; finite SNR diversity multiplexing tradeoff; finite signal-to-noise ratio diversity multiplexing tradeoff; multiple input multiple output wiretap channel; orthogonal space; outage probability; secrecy constraint; secret diversity gain; secret information; secret multiplexing gain; zero forcing transmit scheme; Diversity methods; Gain; Helium; MIMO; Multiplexing; Signal to noise ratio; Upper bound;
Conference_Titel :
Communications Workshops (ICC), 2011 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-61284-954-6
Electronic_ISBN :
978-1-61284-953-9
DOI :
10.1109/iccw.2011.5963522
