Title :
Optimal Soft Slicer Design for MMSE-DFE
Author :
Wang, Rujiang ; Delisle, Gilles Y.
Author_Institution :
Univ. Laval, Quebec
Abstract :
A technique on optimal decision feedback equalizer (DFE) soft feedback slicer design is proposed in this letter. A soft slicer of M-ary PAM is given as a function of the noise variance at the slicer input. The equalizer mean-square error (MSE), which includes the error propagation effect, is used as the criterion of the optimal soft slicer design. By incorporating the slicer characteristics into the MSE and the assumption of Gaussian noise distribution at the equalizer output, the optimal soft slicer is obtained by minimizing the MSE. Simulation results corroborate the effectiveness of the method.
Keywords :
Gaussian distribution; Gaussian noise; decision feedback equalisers; intersymbol interference; mean square error methods; pulse amplitude modulation; Gaussian noise distribution; M-ary PAM; decision feedback equalizer; error propagation; inter-symbol interference; minimum mean square error; noise variance; optimal soft slicer design; Decision feedback equalizer (DFE); error propagation; inter-symbol interference (ISI); minimum mean-square error (MMSE); slicer;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2007.905096
