DIGITAL COMMUNICATION DEVICE WITH BIT ERROR REDUCED BY USING TWO SIGNAL TRANSMISSION PATHS

摘要

A digital communication device includes first and second systems in a transmitter of a base station and first and second systems in a receiver of the base station. Inserted in the first system of the transmitter and the first system of the receiver of the base station are delay circuits for ensuring a delay time difference between D and U waves, which difference is employed to obtain an improved bit error rate when utilizing a differential detection communication system such as a DSK system, a BPSK-RZ system or a QPSK-RZ system.