Optimum decision delay of the finite-length DFEGong, Y. and Cowan, C.F.N. (2004) Optimum decision delay of the finite-length DFE. IEEE Signal Processing Letters, 11 (11). pp. 858-861. ISSN 1070-9908 Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1109/LSP.2004.836943 Abstract/SummaryThis work investigates the optimum decision delay and tap-length of the finite-length decision feedback equalizer. First we show that, if the feedback filter (FBF) length Nb is equal to or larger than the channel memory v and the decision delay Δ is smaller than the feedforward filter (FFF) length Nf, then only the first Δ+1 elements of the FFF can be nonzero. Based on this result we prove that the maximum effective FBF length is equal to the channel memory v, and if Nb ≥ v and Nf is long enough, the optimum decision delay that minimizes the MMSE is Nf-1.
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