A blind maximum likelihood carrier frequency offset correction approach for OFDM systems over multipath fading channels

作者：Liu Yuan^*; Mikhael Wasfy B

来源：Circuits, Systems, and Signal Processing, 2007, 26(1): 43-54.

DOI：10.1007/s00034-005-0922-0

• carrier frequency offset
• independent component analysis
• maximum likelihood
• orthogonal frequency division multiplexing

In orthogonal frequency division multiplexing (OFDM) systems, carrier frequency offset (CFO) destroys the orthogonality between subcarriers and hence introduces intercarrier interference. In this paper, a maximum likelihood CFO correction (ML-CFOC) approach is proposed to compensate for the deleterious effects of CFO. The ML-CFOC method exploits the independence between the desired signals and is based on a novel simplified independent component analysis algorithm. The proposed ML-CFOC approach is successfully implemented for OFDM systems over multipath fading channels without requiring training sequences. Computer simulations are given to illustrate the optimal performance of the ML-CFOC.

• 出版日期2007-2