COMMUNICATION SYSTEM FOR BINARY CODED DATA

摘要

A square-wave carrier signal is combined with a bi-level binary-coded data signal, which has a data bit time equal to the period of one cycle of carrier signal, to produce a phase-modulated carrier in which the phase of the second half of each cycle of carrier signal is shifted 180 DEG only if the bit contained in the corresponding bit period is at a preselected one of its two possible levels representing either a binary "one" or "zero" otherwise referred to as a mark or a space.