Open AccessPrecoding for secrecy rate maximisation in cognitive MIMO wiretap channels
Author(s) -
Fang Bing,
Qian Zuping,
Zhong Wei,
Shao Wei
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.1486
Subject(s) - precoding , mimo , mathematical optimization , taylor series , channel (broadcasting) , secrecy , convex optimization , regular polygon , computer science , physical layer , optimization problem , iterative method , mathematics , wireless , telecommunications , computer security , mathematical analysis , geometry
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.