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A fast computation algorithm for the decision feedback equalizer

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2 Author(s)
Inkyu Lee ; Dept. of Electr. Eng., Stanford Univ., CA, USA ; Cioffi, J.M.

A novel fast algorithm for computing the minimum MSE decision feedback equalizer settings is proposed. The equalizer filters are computed indirectly, first by estimating the channel, and then by computing the coefficients in the frequency domain with the discrete Fourier transform (DFT). Approximating the correlation matrices by circulant matrices facilitates the whole computation with very small performance loss. The fractionally spaced equalizer settings are derived. The performance of the fast algorithm is evaluated through simulation. The effects of the channel estimation error and finite precision arithmetic are briefly analyzed. Results of simulation show the superiority of the proposed scheme

Published in:

Communications, IEEE Transactions on  (Volume:43 ,  Issue: 11 )

Date of Publication:

Nov 1995

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