1 research outputs found
Increasing Security Degree of Freedom in Multi-user and Multi-eve Systems
Secure communication in the Multi-user and Multi-eavesdropper (MUME) scenario
is considered in this paper. It has be shown that secrecy can be improved when
the transmitter simultaneously transmits information-bearing signal to the
intended receivers and artificial noise to confuse the eavesdroppers. Several
processing schemes have been proposed to limit the co-channel interference
(CCI). In this paper, we propose the increasing security degree of freedom
(ISDF) method, which takes idea from the dirty-paper coding (DPC) and ZF
beam-forming. By means of known interference pre-cancelation at the
transmitter, we design each precoder according to the previously designed
precoding matrices, rather than other users' channels, which in return provides
extra freedom for the design of precoders. Simulations demonstrate that the
proposed method achieves the better performance and relatively low complexity.Comment: TIF