Name
Title | ||
|---|---|---|
Robust frequency synchronization for an OFDMA uplink system disturbed by a Cognitive Radio system interference |
Abstract | ||
|---|---|---|
In Cognitive Radio (CR) systems, spectrum sensing plays a key role to determine the free frequency bands. However, when the primary-user (PU) signal spectrum exhibits localized fading, PU detection cannot be guaranteed. In addition, as the CR may use the PU faded frequencies, the PU spectrum can be disturbed by a narrow-band interference (NBI) and synchronization algorithms used for the PU carrier frequency offset (CFO) estimation suffer degradations. In this paper, we propose a new scheme that jointly allows the CR-NBI to be detected and the PU-CFOs and the channels to be estimated in an orthogonal frequency division multiple access (OFDMA) system. It combines a sigma point Kalman filter and a test aiming at detecting a variation of the measurement-noise covariance matrix. Simulation results confirm that the proposed algorithm can accurately detect the CR-NBI and estimate the PU-CFOs. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/ICASSP.2011.5946245 | Acoustics, Speech and Signal Processing |
Keywords | Field | DocType |
Kalman filters,cognitive radio,covariance matrices,frequency division multiple access,OFDMA uplink system,carrier frequency offset estimation,cognitive radio system interference,covariance matrix,localized fading,narrowband interference,orthogonal frequency division multiple access system,primary-user,robust frequency synchronization,sigma point Kalman filter,spectrum sensing,synchronization algorithm,OFDMA,cognitive radio,frequency offset estimation,interference detection,sigma point Kalman filter | Control theory,Computer science,Fading,Carrier frequency offset,Artificial intelligence,Interference (wave propagation),Radio spectrum,Pattern recognition,Orthogonal frequency-division multiple access,Algorithm,Frequency-division multiple access,Orthogonal frequency-division multiplexing,Cognitive radio | Conference |
ISSN | ISBN | Citations |
1520-6149 E-ISBN : 978-1-4577-0537-3 | 978-1-4577-0537-3 | 1 |
PageRank | References | Authors |
0.37 | 8 | 3 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Héctor Poveda | 1 | 8 | 2.61 |
| Guillaume Ferré | 2 | 36 | 13.29 |
| Eric Grivel | 3 | 136 | 33.92 |