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CLC number: TN929.5

On-line Access: 2009-11-30

Received: 2009-03-14

Revision Accepted: 2009-06-04

Crosschecked: 2009-09-29

Cited: 2

Clicked: 4688

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE C 2010 Vol.11 No.1 P.14-26

http://doi.org/10.1631/jzus.C0910150


Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems: algorithm, identifiability, and performance analysis


Author(s):  Wei-yang XU, Bo LU, Xing-bo HU, Zhi-liang HONG

Affiliation(s):  Department of Microelectronics, Fudan University, Shanghai 201203, China; more

Corresponding email(s):   weiyangxu@fudan.edu.cn

Key Words:  Orthogonal frequency-division multiplexing (OFDM), Constant modulus (CM), Carrier frequency offset (CFO), Blind estimation, Multiple-input multiple-output (MIMO)


Wei-yang XU, Bo LU, Xing-bo HU, Zhi-liang HONG. Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems: algorithm, identifiability, and performance analysis[J]. Journal of Zhejiang University Science C, 2010, 11(1): 14-26.

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author="Wei-yang XU, Bo LU, Xing-bo HU, Zhi-liang HONG",
journal="Journal of Zhejiang University Science C",
volume="11",
number="1",
pages="14-26",
year="2010",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.C0910150"
}

%0 Journal Article
%T Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems: algorithm, identifiability, and performance analysis
%A Wei-yang XU
%A Bo LU
%A Xing-bo HU
%A Zhi-liang HONG
%J Journal of Zhejiang University SCIENCE C
%V 11
%N 1
%P 14-26
%@ 1869-1951
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C0910150

TY - JOUR
T1 - Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems: algorithm, identifiability, and performance analysis
A1 - Wei-yang XU
A1 - Bo LU
A1 - Xing-bo HU
A1 - Zhi-liang HONG
J0 - Journal of Zhejiang University Science C
VL - 11
IS - 1
SP - 14
EP - 26
%@ 1869-1951
Y1 - 2010
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.C0910150


Abstract: 
carrier frequency offset (CFO) estimation is critical for orthogonal frequency-division multiplexing (OFDM) based transmissions. In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus (CM) signaling. Both single-input single-output (SISO) and multiple-input multiple-output (MIMO) systems are considered. Based on the assumption that the channel keeps constant during estimation, we prove that the CFO can be estimated uniquely and exactly through minimizing the power difference of received data on the same subcarriers between two consecutive OFDM symbols; thus, the identifiability problem is assured. Inspired by the sinusoid-like cost function, curve fitting is utilized to simplify our algorithm. Performance analysis reveals that the proposed estimator is asymptotically unbiased and the mean square error (MSE) exhibits no error floor. We show that this blind scheme can also be applied to a MIMO system. Numerical simulations show that the proposed estimator provides excellent performance compared with existing blind methods.

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