Back to Search
Start Over
Robust frequency synchronization for an OFDMA uplink system disturbed by a Cognitive Radio system interference
- Source :
- ICASSP
- Publication Year :
- 2011
- Publisher :
- IEEE, 2011.
-
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.
- Subjects :
- Frequency-division multiple access
[INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing
Orthogonal frequency-division multiplexing
Computer science
synchronisation fréquentielle
Orthogonal frequency-division multiple access
radio congnitive
Interference (wave propagation)
Frequency spectrum
Radio spectrum
OFDMA
Cognitive radio
Control theory
Carrier frequency offset
Telecommunications link
Fading
Algorithm
ComputingMilieux_MISCELLANEOUS
[SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Communication channel
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
- Accession number :
- edsair.doi.dedup.....981bfc581db32dc113cd57b47c3e96ce