Title :
OFDM blind carrier offset estimation: ESPRIT
Author :
Tureli, Ufuk ; Liu, Hui ; Zoltowski, Michael D.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
In orthogonal frequency-division multiplex (OFDM) communications, the loss of orthogonality due to the carrier-frequency offset must be compensated before discrete Fourier transform-based demodulation can be performed. This paper proposes a new carrier offset estimation technique for OFDM communications over a frequency-selective fading channel. We exploit the intrinsic structure information of OFDM signals to derive a carrier offset estimator that offers the accuracy of a super resolution subspace method, ESPRIT
Keywords :
OFDM modulation; blind equalisers; cellular radio; demodulation; discrete Fourier transforms; fading channels; parameter estimation; synchronisation; ESPRIT; OFDM blind carrier offset estimation; carrier-frequency offset; cellular communications; digital broadcasting; discrete Fourier transform-based demodulation; equalizer; frequency-selective fading channel; intrinsic structure information; multicarrier modulation; multipath channels; orthogonal frequency-division multiplex communications; orthogonality; radio receiver; super resolution subspace method; Bandwidth; Demodulation; Frequency division multiplexing; Frequency estimation; Frequency-selective fading channels; Multipath channels; OFDM modulation; Receivers; Signal resolution; Wireless sensor networks;
Journal_Title :
Communications, IEEE Transactions on
