DocumentCode :
1975063
Title :
A high efficiency carrier estimator for OFDM communications
Author :
Tureli, Ufuk ; Liu, Hui ; Zoltowski, Michael D.
Author_Institution :
Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA
Volume :
1
fYear :
1997
fDate :
2-5 Nov. 1997
Firstpage :
505
Abstract :
In OFDM communications, the loss of orthogonality due to carrier offset must be compensated before DFT-based demodulation can be performed. We present two blind carrier offset estimation algorithms by exploiting the intrinsic structure information of OFDM signals. Both algorithms offer the accuracy of super resolution subspace methods, viz., MUSIC and ESPRIT, without involving computationally intensive subspace decompositions. Adaptation rules for implementation of one of the proposed algorithm are provided. Also derived is the Cramer-Rao bound of the carrier offset estimates with which the performance of the new algorithms is evaluated.
Keywords :
adaptive estimation; demodulation; discrete Fourier transforms; frequency division multiplexing; modulation; parameter estimation; signal resolution; Cramer-Rao bound; DFT-based demodulation; ESPRIT; MUSIC; OFDM communications; OFDM signals; accuracy; adaptation rules; blind carrier offset estimation algorithms; carrier tracking; high efficiency carrier estimator; performance; super resolution subspace methods; Bandwidth; Broadcasting; Demodulation; Fading; Frequency estimation; Frequency synchronization; Multiple signal classification; OFDM; Signal resolution; Timing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
ISSN :
1058-6393
Print_ISBN :
0-8186-8316-3
Type :
conf
DOI :
10.1109/ACSSC.1997.680429
Filename :
680429
Link To Document :
بازگشت