IEEE transactions on communications, 2009-12, Vol.57 (12), p.3743-3752
2009
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Details
- Autor(en) / Beteiligte
- Titel
- Fine frequency synchronization in the uplink of multiuser OFDM systems
- Ist Teil von
- IEEE transactions on communications, 2009-12, Vol.57 (12), p.3743-3752
- Ort / Verlag
- New York, NY: IEEE
- Erscheinungsjahr
- 2009
- Quelle
- IEL
- Beschreibungen/Notizen
- This contribution considers the estimation and compensation of residual multiple carrier frequency offsets (CFOs) and sampling frequency offsets (SFOs) in the uplink of multiuser OFDM systems. Based on the observation of a user-dependent phase rotation, an approximate maximum-likelihood (ML) estimator is proposed in order to estimate the CFOs and SFOs and to track the phase in a post-synchronization step. By using a Taylor approximation, the estimation complexity is reduced. Bit error-ratio (BER) simulations show that the system performance degradation due to (small) frequency mismatches is negligible if the proposed method is applied.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0090-6778eISSN: 1558-0857DOI: 10.1109/TCOMM.2009.12.080305Titel-ID: cdi_proquest_journals_856907186
- Format
- –
- Schlagworte
- Applied sciences, Approximation, Bit error rate, Carrier frequencies, Carrier frequency offset, Degradation, Doppler shift, Estimators, Exact sciences and technology, Frequency estimation, Frequency synchronization, Information, signal and communications theory, Mathematical analysis, Maximum likelihood estimation, Multiplexing, multiuser, OFDM, Offsets, Orthogonal Frequency Division Multiplexing, Oscillators, Phase estimation, Sampling, sampling frequency offset, Sampling methods, Signal and communications theory, Simulation, Telecommunications and information theory, uplink