Paper Info
Title
Way to design an orthogonal frequency-division multiple access-base station receiver disturbed by a narrowband interfering cognitive radio signal
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.
Year
DOI
Venue
2015
10.1049/iet-com.2014.1122
Communications, IET
Keywords
DocType
Volume
Kalman filters,OFDM modulation,cognitive radio,covariance matrices,spread spectrum communication,CR narrowband interference,CR-NBI,Kalman filter-based approach,PU received-signal spectrum,covariance matrix,interweave cognitive-radio system,multipath propagation channel,narrowband interfering cognitive radio signal,orthogonal frequency-division multiple access-base station receiver,primary users,wideband wireless communications
Journal
9
Issue
ISSN
Citations 
12
1751-8628
0
PageRank 
References 
Authors
0.34
9
3
Name
Order
Citations
PageRank
Héctor Poveda182.61
Guillaume Ferré23613.29
Eric Grivel313633.92