A blind equalization method for a high definition television signal

摘要

An adaptive equalizer updates its tap coefficients with the aid of an error signal e(k) = sign[ z(k) ] * (RS - |z(k)|2) where sign[ ] is the sign function, z(k) is the equalizer output at symbol time k, || is the magnitude function and R S is a positive real constant, which is optimally defined as RS = E{|an|3} / E{|an|}, where E{ } is the mathematical expectation function and an is the information symbol at symbol time n. A generalized equalizer error signal satisfies e(k) = sign[ z(k) ] * (RSp - | z(k) |p) where R Sp is a positive real constant, which is optimally defined as RSp = E{|an|p+1} / E{|an|} and p is a positive integer. The equalizer conducts blind equalization of an Advanced Television Systems Committee-High Definition Television signal and any other one-dimensional modulation system.