DATA SYNCHRONIZATION SYSTEM FOR MOBILE BODY SATELLITE COMMUNICATION SYSTEM

摘要

PURPOSE:To allow a center station to reproduce correctly an out-bound signal sent from a network control station via an asynchronization line. CONSTITUTION:A control section 10 of a network control station generates an out-bound signal S1 in response to a frame timing signal F1 generated by a frame timing generating circuit 11 and sends it to a MODEM section 20 of the center station via an asynchronization line 30 as a packet signal S2 by a data output circuit 13. A data reception circuit 21 of the MODEM section 20 latches once data by one packet. A frame detection circuit 22 detects a head of a frame from the packet signal S2 to output a frame detection signal D. A timing generating circuit 23 generates a clock signal C and a frame timing signal F2 synchronously with the frame detection signal D. The data reception circuit 21 outputs the latched data in response to the timing signal C to reproduce an out-bound signal S3.