NDLI: Way to design an orthogonal frequency-division multiple access-base station receiver disturbed by a narrowband interfering cognitive radio signal

Content Provider	IET Digital Library
Author	Poveda, Héctor Ferré, Guillaume Grivel, Eric
Abstract	This study deals with an interweave cognitive-radio (CR) system, where an uplink orthogonal frequency-division multiple access system is considered for the primary users (PUs). Our purpose is to estimate the PU carrier frequency offsets (PU-CFOs) as well as the channels to estimate the transmitted symbols. However, in wideband wireless communications, the PU received-signal spectrum usually exhibits a localised fading because of the multipath propagation channel. When the PU faded frequencies are used by the CR system, the PU system is contaminated by a CR narrowband interference (CR-NBI). In that case, if a Kalman filter (KF)-based approach is used for the estimations of the CFOs and the channels, the state-space representation does not necessarily take into account the CR-NBI; this hence has a negative impact on the algorithm performance. Therefore the authors propose to make this solution more robust to the CR-NBI by detecting when it appears and disappears to avoid using the data disturbed by the CR-NBI. The authors’ contribution is to assume that the CR-NBI is because of the transmission of contiguous blocks and to propose various criteria based on the covariance matrix of the KF innovation.
Starting Page	1547
Ending Page	1554
Page Count	8
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 12, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1122
Journal	IET Communications
Publisher Date	2015-06-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Cognitive Radio Covariance Matrices Covariance Matrix CR Narrowband Interference CR-NBI Filtering Method in Signal Processing Interweave Cognitive-radio System Kalman Filter Kalman Filter-based Approach Modulation And Coding Method Multipath Propagation Channel Narrowband Interfering Cognitive Radio Signal OFDM Modulation Orthogonal Frequency-division Multiple Access-base Station Receiver Primary User PU Received-signal Spectrum Radio Link And Equipment Spread Spectrum Communication Wideband Wireless Communication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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