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A blind fractionally spaced equalizer using higher order statistics

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3 Author(s)
Jie Zhu ; Center for Signal Process., Nanyang Technol. Univ., Singapore ; Xi-Ren Cao ; Ruey-Wen Liu

In this paper, we introduce a new blind fractionally spaced equalizer based on the fourth-order statistics of the input symbol sequence. The input symbol sequence is assumed to come from an independent identically distributed finite alphabet with nonzero fourth-order cumulants. We formulate the equalizer as a column vector and compute it by simultaneously diagonalizing a set of matrices obtained from the fourth-order cross-cumulants of the input and output of the equalizer. Simulation results show that this equalizer works well with a short symbol sequence, even if the channel time span is not accurately estimated

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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:46 ,  Issue: 6 )