A study on adaptive fractionally spaced blind equalization for phase correction in spectrum depth fading channels

Abstract An adaptive fractionally spaced equalizer based on a modified constant modulus algorithm is studied to overcome the shortcomings of a constant modulus blind equalization algorithm in a spectrum depth fading channel. This paper deduces the fractional-spaced modified constant modulus algorithm and simulates and verifies the performance of the equalizer. The simulation results show that the blind equalizer using the fractionally spaced modified constant modulus algorithm not only avoids the spectrum aliasing caused by the under-sampling of the equalizer and corrects the phase deflection caused by the spectrum depth fading channel, but also reduces the mean square error of the output signal of the blind equalizer.