On the Performance of the Mismatched MMSE and the LS Linear Equalizers

@article{Liavas2007OnTP,
  title={On the Performance of the Mismatched MMSE and the LS Linear Equalizers},
  author={Athanasios P. Liavas and Despoina Tsipouridou},
  journal={IEEE Transactions on Signal Processing},
  year={2007},
  volume={55},
  pages={3302-3311}
}
We consider two widely referenced trained finite-length linear equalizers, namely, the mismatched minimum mean square error (MMSE) equalizer and the least-squares (LS) equalizer. Using matrix perturbation theory, we express both of them as perturbations of the ideal MMSE equalizer and we derive insightful analytical expressions for their excess mean square error. We observe that, in general, the mismatched MMSE equalizer performs (much) better than the LS equalizer. We attribute this phenomenon… CONTINUE READING