Title :
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
fDate :
6/30/1905 12:00:00 AM
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;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2008.2005811
