Title :
Precoding for secrecy rate maximisation in cognitive MIMO wiretap channels
Author :
Bing Fang ; Zuping Qian ; Wei Zhong ; Wei Shao
Author_Institution :
Coll. of Commun. Eng., PLAUST, Nanjing, China
Abstract :
The problem of physical layer security in a cognitive MIMO wiretap channel is studied. The problem is formulated as a secrecy rate maximisation (SRM) problem, and solved by a successive convex approximation (SCA) method. With the SCA method, the non-convex part of the SRM problem is approximated by its first-order Taylor expansion. Then, relying on solving a series of convexified optimisation problems, an iterative precoding algorithm is developed.
Keywords :
MIMO communication; approximation theory; cognitive radio; iterative methods; optimisation; precoding; wireless channels; SCA method; SRM problem; Taylor expansion; cognitive MIMO wiretap channels; cognitive multiple-input-multiple-output wiretap channel; iterative precoding algorithm; physical layer security; secrecy rate maximisation precoding; successive convex approximation method;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.1486
