| 摘要 |
AN ADAPTIVE CHANNEL EQUALIZER (50) FOR PROCESSING A DEMODULATED VSB SIGNAL CONTAINING TERRESTRIAL BROADCAST HIGH DEFINATION TELEVISION INFORMATION INCLUDES AN ADAPTIVE FEED FORWARD FILTER (FFF 20) AND AN ADAPTIVE DECISION FEEDBACK FILTER (DFF 30). THE EQUALIZER IS PRECEDED BY A DEMOLUTOR/CARRIER RECOVERY NETWORK (18) AND DOES NOT INCLUDE A CARRIER RECOVERY FUNCTION IN THE EQUALIZER CONTROL LOOP. THE EQUALIZER FFF AND DFF ELEMENTS OPERATE ADAPTIVELY IN BLIND, TRAINING, AND DECISION-DIRECTED MODES. A DIRECT CONNECTION PROVIDED FROM THE EQUALIZER OUTPUT TO THE DFF FACILITIES COARSE SIGNAL ACQUISITION AND EQUALIZATION DURING THE BLIND OPERATING MODE.(FIGURE 1)
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