AGC loop,tim ing loop,carrier loop and orthogonal DFE are the important parts for the implementation of 16QAM demodulator,their principles are introduced in detail,and the implementation of each part is analyzed with respect to hardware.

The main problem of gauge closed loop AGC system is adaptive problem of adjuster parameters control.

Distributed Computer Control in Hydraulic AGC System of Tandem Cold Rolling Mill;

Simulation and comparison of several hydraulic AGC systems;

The Research of Selection Method of Sample Period in Hydraulic AGC;

Aiming at the typical electro-hydraulic position servo system of hydraulic screw down of rolling mill,the merits and demerits of both PID control and repetitive control for the AGC compensation and roll eccentricity compensation are analyzed,then a novel multiple control scheme is presented,based on the PID control with inserted repetitive control.

It is necessary to hit the head of the strip for applying absolute AGC,and important means are to improve accuracy of set-up model and convergence of self-learning model.

For improving further automatic gauge control accuracy of the whole strip,it is necessary to increase the main strip head percentage in order to launch into absolute AGC.

It is necessary to hit accurately the head of the strip for applying absolute AGC in hot rolling mill,important means are to improve accuracy of set-up model and convergence of self-learning model.