Adaptive equalizer system for quadrature amplitude modulation

摘要

An adaptive equalizer system for quadrature amplitude modulated waves is disclosed herein. The equalizer system comprises a circuit for equalizing the received signal as a function of a composite control signal; a circuit for generating a first control signal as a function of the deviation of the equalized signal from a zero-forced waveform; a circuit for generating a second control signal as a function of the asynchronization of the equalizer system; and an output circuit for processing both of said first control signal and said second control signal, producing the composite control signal which controls the equalizing means of the equalizer system.