Title :
Data-Aided Joint Estimation of Carrier Frequency Offset and Frequency-Selective Time-Varying Channel
Author :
Ricklin, Nathan ; Zeidler, James R.
Author_Institution :
Sch. of Electr. & Comput. Eng., Univ. of California, San Diego, CA
Abstract :
The issue of data-aided joint carrier frequency offset (CFO) and channel estimation is investigated in the presence of a rapidly time-varying frequency-selective channel. We derive novel joint CFO/channel estimators for two cases: known and unknown channel statistics. The CFO estimator that makes use of known channel statistics is shown to attain the Cramer-Rao bound. If channel statistics are unknown to the estimator then a parameterization of the time-varying channel is required and this is shown to degrade performance. Theoretical analysis of the derived estimators is provided along with simulation results.
Keywords :
channel estimation; frequency estimation; time-varying channels; Cramer-Rao bound; channel statistics; data-aided joint carrier frequency offset estimation; frequency-selective time-varying channel estimation; Channel estimation; Communication systems; Degradation; Frequency estimation; Maximum likelihood estimation; OFDM; Parameter estimation; Statistics; Time-varying channels; Transmitters;
Conference_Titel :
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2075-9
Electronic_ISBN :
978-1-4244-2075-9
DOI :
10.1109/ICC.2008.116
