NDLI: Interference alignment designs for secure multiuser MIMO systems: rank constrained rank minimization approach

Content Provider	IEEE Xplore Digital Library
Author	Vu, T.T. Ha Hoang Kha Duong, T.Q.
Copyright Year	2015
Description	Author affiliation: Duy Tan Univ., Da Nang, Vietnam (Vu, T.T.) \|\| Ho Chi Minh City Univ. of Technol., Ho Chi Minh City, Vietnam (Ha Hoang Kha) \|\| Queen's Univ. Belfast, Belfast, UK (Duong, T.Q.)
Abstract	In this paper, we formulate the interference alignment (IA) problem for a multiuser multiple-input multiple-output (MIMO) system in the presence of an eavesdropper as a rank constrained rank minimization (RCRM) problem. The aim of the proposed rank minimization IA schemes is to find the precoding and receiver subspace matrices to align interference and wiretapped signals into the lowest dimension subspaces while keeping the desired signal subspace spanning full available spatial dimensions. To deal with the nonconvexity of the rank function, we present two convex relaxations of the RCRM problem, namely nuclear norm (NN) and reweighted nuclear norm (RNN), and transform the rank constraints to equivalent and tractable ones. We then derive a coordinate decent approach to obtain the solutions for IA schemes. The simulation results show that our proposed IA designs outperform the conventional IA design in terms of average secrecy sum rate. On the other hand, our proposed designs perform the same or better than other secure IA schemes which account for low interference and wiretapped signal power rather than for low dimensions of interference and wiretapped signal matrices in the systems which achieve the perfect IA.
Starting Page	116
Ending Page	121
File Size	658310
Page Count	6
File Format	PDF
e-ISBN	9781467365475
DOI	10.1109/ComManTel.2015.7394271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-12-28
Publisher Place	Vietnam
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multi-user Wiretapchannel Interference Receivers Cost function Approximation algorithms Minimization MIMO Secure communication Interference Alignment
Content Type	Text
Resource Type	Article

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