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Turbo DFE Algorithm With Imperfect Decision Feedback

Trajkovic, Vladimir; Rapajic, Predrag; Kennedy, Rodney


In this letter, we propose a new turbo decision feedback equalizer (DFE) algorithm that takes into account decision feedback error propagation. We derive the exact mathematical expression for the probability density function (pdf) of soft decision feedback symbols, assuming that soft outputs from channel decoder are independent identically distributed Gaussian random variables with known mean and variance. We find a new set of "imperfect" turbo minimum mean-square error DFE coefficients based...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: IEEE Signal Processing Letters
DOI: 10.1109/LSP.2005.859524


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