Blind estimation of residual carrier offset in OFDM systems

In orthogonal frequency division multiplexing (OFDM) systems, the loss of orthogonality between the subcarriers due to carrier offset can degrade the performance of the system. In the literature, Liu and Tureli proposed a blind, music-like method to solve such a problem. The latter has a good performance as compared to the Cramer-Rao bound, but can have a very high computational complexity. In this letter, based on practical considerations, we present a new implementation of the previous method that reduces significantly the cost without sacrificing the performance.

[1]  David M. Pozar,et al.  Microwave and Rf Design of Wireless Systems , 2000 .

[2]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..

[3]  Hui Liu,et al.  A high efficiency carrier estimator for OFDM communications , 1998, Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136).

[4]  Michael D. Zoltowski,et al.  OFDM blind carrier offset estimation: ESPRIT , 2000, IEEE Trans. Commun..

[5]  Sergio Barbarossa,et al.  Non-data-aided carrier offset estimators for OFDM with null subcarriers: identifiability, algorithms, and performance , 2001, IEEE J. Sel. Areas Commun..

[6]  J. Miller.  Numerical Analysis , 1966, Nature.

[7]  Didem Kivanc-Tureli,et al.  Experimental and analytical studies on a high-resolution OFDM carrier frequency offset estimator , 2001, IEEE Trans. Veh. Technol..

[8]  Samir Attallah,et al.  Joint channel and carrier offset estimation in a multiuser CDMA system , 2002, IEEE Communications Letters.

[9]  J. Douglas Faires,et al.  Numerical Analysis , 1981 .