2016/06/14 by Stefano Tomasin, Tomasin, Stefano
Engineering · Computer Science · #Wireless Communication Security Techniques #Cooperative Communication and Network Coding #Full-Duplex Wireless Communications
paper · pdf · doi:10.48550/arxiv.1606.04458
We consider a wiretap channel with an eavesdropper (Eve) and an honest but\ncurious relay (Ray). Ray and the destination (Bob) are full-duplex (FD)\ndevices. Since we aim at not revealing information on the secret message to the\nrelay, we consider the scaled compute-and-forward (SCF) where scaled lattice\ncoding is used in the transmission by both the source (Alice) and Bob in order\nto allow Ray to decode only a linear combination of the two messages. At the\nsame time Ray transmits artificial noise (AN) to confuse Eve. When Ray relays\nthe decoded linear combination, Alice and Bob are transmitting AN against Eve.\nThis can be a 5G cellular communication scenario where a mobile terminal (MT)\naims at transmitting a secret message to a FD base station (BS), with the\nassistance of a network FD relay. With respect to existing literature the\ninnovations of this paper are: a) Bob and Ray are FD devices; b) Alice, Ray and\nBob transmit also AN; and c) the channel to Eve is not known to Alice, Bob and\nRay. For this scenario we derive bounds on both the secrecy outage probability\nunder Rayleigh fading conditions of the channels to Eve, and the achievable\nsecrecy-outage rates.\n