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To estimate carrier frequency offset, a polynomial-rooting algorithm is proposed for symbols with constant modulus in OFDM systems. This algorithm makes use of the orthogonal subspace of the squared spectrum vector of the channel. Among the group of non-iterative methods, the algorithm offers the best accuracy.
To estimate carrier frequency offset, a polynomial-rooting-and-evaluation algorithm is proposed for symbols with constant modulus in OFDM systems. This algorithm makes use of the orthogonal subspace of the squared spectrum vector of the channel. The algorithm improves an existing non-iterative method.
In this paper, a blind algorithm is proposed for channel and CFO estimation in zero-prefix OFDM systems. By exploiting the greatest common divisor structure of the received signal for two or more symbols, the algorithm yields joint estimates of channel parameters and carrier frequency offset. It provides error-free message recovery at moderate SNRs.
For the carrier frequency offset estimation in wireless LAN applications, three maximum likelihood algorithms are developed by exploiting the OFDM data structures of the short and long symbols. These algorithms can be implemented via polynomial rooting and have a full acquisition range of the carrier frequency offset. Their performance has been studied and compared to that of the methods based on...
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