Blind Carrier Frequency Offset Estimation for OFDM System with Multiple Antennas using Multiple-invariance Properties

Authors:
Xiaofei Zhang;Xin Gao;Dayuan Wang;Dazhuan Xu
Affiliations:
Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016;Department of Electronic Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China 210016
Venue:
Wireless Personal Communications: An International Journal
Year:
2010

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Abstract

In this paper, we address the problem of carrier frequency offset (CFO) estimation for Orthogonal Frequency Division Multiplexing (OFDM) communications systems with multiple antennas. We reconstruct the received signal to form data model with multi-invariance property, and subsequently derive a multiple-invariance ESPRIT algorithm for CFO estimation. This algorithm has improved CFO estimation compared to ESPRIT method and maximum likelihood method. Simulation results illustrate performance of this algorithm.