Patent ID: 6577647
Filing Date: 2003-06-10
Classification: H04J

Abstract:
A synchronization system having a first device and a second device, whereinsaid first device comprises: a first PN signal generator which generates a PN signal in synchronization with a predetermined timing signal; a first multiplexer which transmits a first multiplexing signal obtained by multiplexing transmission information data to be transmitted and said PN signal; a first demultiplexer which receives a signal transmitted from said second device and which demultiplexes the received signal into the transmission information data and the PN signal; and a first detector which detects a first timing error that is an error between said PN signal obtained by demultiplexing and said PN signal generated by said first PN signal generator; said second device comprises; a second PN signal generator which generates a PN signal in synchronization with a predetermined timing signal; a second multiplexer which transmits a multiplexing signal obtained by multiplexing transmission information data to be transmitted and said PN signal; a second demultiplexer which receives a signal transmitted from said first device and which demultiplexes the received signal into the transmission information data and the PN signal; and a second detector which detects a second timing error that is an error between said PN signal obtained by demultiplexing, and said PN signal generated by said second PN signal generator, said second PN signal generator correcting operation timing so as to cancel said second timing error detected by said second detector, and said first PN signal generator shifting operation timing ahead by a time corresponding to half the first timing error detected by said first detector.