A Low-Complexity Blind Carrier Frequency Offset Estimator for MIMO-OFDM Systems

Author

Wu, Lu ; Zhang, Xian-Da ; Li, Pei-Sheng

Author_Institution

Dept. of Autom., Tsinghua Univ., Beijing

Volume

15

fYear

2008

fDate

6/30/1905 12:00:00 AM

Firstpage

769

Lastpage

772

Abstract

Carrier frequency offset (CFO) is an important problem in multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems. This letter proposes a blind CFO estimator for MIMO-OFDM systems with constant modulus constellations in the frequency-selective fading channels. A closed-form CFO estimate is also provided, which greatly reduces the computational complexity of the proposed method. Analysis and simulation results demonstrate that the proposed estimator is very effective for MIMO-OFDM systems.

Keywords

MIMO communication; OFDM modulation; communication complexity; fading channels; frequency selective surfaces; MIMO-OFDM systems; computational complexity; frequency-division multiplexing; frequency-selective fading channels; low-complexity blind carrier frequency offset estimator; multiinput multioutput orthogonal system; Analytical models; Computational complexity; Degradation; Discrete Fourier transforms; Frequency division multiplexing; Frequency estimation; Frequency-selective fading channels; OFDM; Receiving antennas; Transmitting antennas; Carrier frequency offset (CFO); multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM); power spectrum;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2008.2005811

Filename

4682554