Performance of Shalvi and Weinstein's blind deconvolution criteria for channels with/without zeros on the unit circle

In this paper, we show that Shalvi and Weinstein's (1994) blind deconvolution criteria are applicable for finite SNR regardless of channels having zeros on the unit circle or not. The associated deconvolution filter is stable with a nonlinear relation to the nonblind MMSE equalizer and capable of performing perfect phase equalization for finite SNR.