Blind adaptive filtering in the frequency domain

Efficient block implementations which are based on frequency-domain techniques of the constant modulus and the P-vector least-mean-square blind algorithms are described. These realizations have much less computational complexity than nonblock time-domain methods, and they can have improved convergence properties. Although several implementations are possible, including filter-bank and multirate structures, only linear convolution methods are used. A frequency-domain realization of a T/2-spaced constant modulus algorithm equalizer is examined, and computer simulations are presented