When has a decision-directed equalizer converged?

@article{Kennedy1989WhenHA,
  title={When has a decision-directed equalizer converged?},
  author={Rodney A. Kennedy and Graham W. Pulford and Brian D. O. Anderson and Robert R. Bitmead},
  journal={IEEE Trans. Communications},
  year={1989},
  volume={37},
  pages={879-884}
}