SYNCHRONIZATION SYSTEM FOR COMMUNICATION INFORMATION IN PCM TIME DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM

摘要

A memory stores a unique word pattern and a predicted receiving time for each burst in a frame in a communication synchronization system of a time division multiple access communication system. A counter counts the timing of a frame. A coincidence detection circuit couples the counter to a receiving time circuit and determines coincidence between the count of the counter and the predicted receiving time stored in the memory and actuates the receiving time circuit when coincidence is detected. A unique word register stores the unique word pattern. A unique word detector having outputs and an input is coupled to the receiving time circuit via the unique word register and determines coincidence between the unique word pattern and the unique word pattern of a received burst. The unique word detector is initiated in operation by a signal from the receiving time circuit. A correcting circuit coupled to the outputs of the unique word detector determines a deviation between the time of reception of the burst and the predicted receiving time and corrects the predicted receiving time in accordance with the deviation.