Title :
Frequency offset estimation in OFDM using sample covariance
Author :
Levin, G. ; Wulich, D.
Author_Institution :
Dept. of Electr. Eng. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
We consider the performance of the parametric weighted least square (PWLS) algorithm for frequency offset estimation in orthogonal frequency-division multiplexing (OFDM). No training sequence or redundant information is needed. The correlation between symbols is achieved due to channel spreading, which is assumed to be a linear time invariant (LTI) filter with known impulse response. We show that the frequency estimator based on a PWLS algorithm may be used in a tracking mode of the OFDM receivers
Keywords :
OFDM modulation; covariance analysis; filtering theory; frequency estimation; least squares approximations; receivers; signal sampling; OFDM receivers; PWLS algorithm; channel spreading; frequency offset estimation; impulse response; linear time invariant filter; orthogonal frequency-division multiplexing; parametric weighted least square algorithm; sample covariance; symbols correlation; tracking mode; AWGN; Baseband; Demodulation; Frequency estimation; Laboratories; Least squares approximation; Mathematical model; Nonlinear filters; OFDM; Transmitters;
Conference_Titel :
Military Communications Conference, 1998. MILCOM 98. Proceedings., IEEE
Print_ISBN :
0-7803-4506-1
DOI :
10.1109/MILCOM.1998.722214
