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Minimum mean-squared error decision-feedback equalization for digital subscriber line transmission with possibly correlated line codes

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1 Author(s)
Lin, D.W. ; Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

The author presents a theory on MMSE (minimum mean-squared error) decision-feedback equalization which augments previously published results by allowing both a correlated symbol sequence and a fractionally spaced DFE (decision-feedback equalizer) forward filter. This theory facilitates calculating the potential DSL (digital subscriber line) transmission performance in cases of correlated line codes, especially for situations where one or both of the DFE filters are infinite in length. The situation of an infinite-length DFE is of interest because it provides information on the limit of MMSE equalization and can thus serve as a benchmark against which the performance of a finite-length DFE may be compared. The author also presents a few numerical examples of the performance of MMSE decision-feedback equalization in DSL transmission at ISDN (integrated services digital network) basic access rates with several well-known line codes

Published in:

Communications, IEEE Transactions on  (Volume:39 ,  Issue: 8 )

Date of Publication:

Aug 1991

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