Digital signal adaptive decision error circuit and method of modulation system of digital modulation system

摘要

end. TECHNICAL FIELD The present invention relates to a technique for determining a judgment error by a limited judgment area of a system using a digital modulation method.;I. A reliable determination error is obtained by obtaining a determination error using a reference signal to limit the determination region and obtaining a determination error.;All. The present invention provides a digital filter for outputting Q channel data having a phase different from that of the I channel data by performing Hilbert transform filtering on input I channel data, A reference signal section processing circuit for inputting I-channel data and outputting a reference signal section detection signal for detecting a slope; and a subtracter for subtracting the I-channel data delayed from the delay element during the reference signal section, An adaptive estimator and a decision error detector for determining symbol data according to the reference error value and outputting a decision error value, and a decision error value output from the adaptive estimator and the decision error detector, and Q channel data output from the digital filter, The tilt detector detects the tilt during the signal interval and outputs the tilt. The Castle.;la. An important application of the invention: The invention applies to all devices using digital modulation schemes.