MIMO Multiple Access Channel with an Arbitrarily Varying Eavesdropper: Secrecy degrees of freedom (2013)

Content Provider	CiteSeerX
Author	He, Xiang Khisti, Ashish Yener, Aylin
Abstract	A two-transmitter Gaussian multiple access wiretap channel with multiple antennas at each of the nodes is investigated. The channel matrices of the legitimate users are fixed and revealed to all the terminals, whereas the channel matrices of the eavesdropper are arbitrarily varying and only known to the eavesdropper. The secrecy degrees of freedom (s.d.o.f.) region under a strong secrecy constraint is characterized. A transmission scheme that orthogonalizes the transmit signals of the two users at the intended receiver, and uses a single-user wiretap code for each user, is shown to achieve the s.d.o.f. region. The converse involves establishing an upper bound on a weighted-sum-rate expression. This is accomplished by using induction, where at each step one combines the secrecy and multiple-access constraints associated with an adversary eavesdropping a carefully selected group of sub-channels.
File Format	PDF
Volume Number	59
Journal	IEEE TRANSACTIONS ON INFORMATION THEORY, FEBRUARY
Language	English
Publisher Date	2013-01-01
Access Restriction	Open
Subject Keyword	Arbitrarily Varying Eavesdropper Mimo Multiple Access Channel Channel Matrix Secrecy Degree Index Term Information Theoretic Security Transmit Signal Strong Secrecy Constraint Multiple-access Constraint Single-user Wiretap Code Weighted-sum-rate Expression Intended Receiver Transmission Scheme Legitimate User Multiple Antenna Upper Bound Mimo Multiple Access Wiretap Channel Adversary Eavesdropping
Content Type	Text
Resource Type	Article