NDLI: Interference alignment in cognitive radio networks

Content Provider	IET Digital Library
Author	Rezaei, Fatemeh Tadaion, Aliakbar
Abstract	A fast algorithm to perform interference alignment (IA) in a cognitive radio network is proposed. Here, the authors consider a network consisting of multiple primary users (PUs) and secondary users (SUs). Although the PUs are cooperating through IA and their rates are maximised by water-filling algorithm, in the secondary network, the authors try to choose the precoding matrices of the SUs such that the interferences at the primary receivers are aligned away from the desired subspaces of the primary receivers. Besides, the interference cancellation of the PUs on the secondary links is considered through designing the post-processing matrices for the secondary links. In this way, their mutual harmful effects are suppressed and SUs could transmit their information simultaneously on the same frequency or time without causing/receiving any interference to/from the primary links. Meanwhile, the feasibility condition for the secondary network regarding the mentioned constraints is investigated. In addition, the rates of the secondary links are maximised by water-filling algorithm. The proposed iterative algorithm is an improved version of minimum weighted leakage interference algorithm with a much faster convergence rate. The analytical results are confirmed through simulations.
Starting Page	1769
Ending Page	1777
Page Count	9
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 10, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2013.0731
Journal	IET Communications
Publisher Date	2014-06-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Code Cognitive Radio Cognitive Radio Network Convergence Rate Electromagnetic Compatibility Interference Interference Alignment Interference Cancellation Interference Suppression Interpolation And Function Approximation Iterative Algorithm Iterative Method Linear Algebra Matrix Algebra Minimum Weighted Leakage Interference Algorithm Mutual Harmful Effect Suppression Numerical Analysis Post-processing Matrix Precoding Precoding Matrix Primary Link Primary Receiver Primary User PU Radio Link And Equipment Secondary Link Secondary Network Secondary User Water-filling Algorithm
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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