| 摘要 |
FIELD: data transmission; frequency-keying data transfer systems. ^ SUBSTANCE: proposed sync signal transmission process uses frequency keying method; in the process, when next piece of information is transferred, carrier-wave phase is inverted and when it is received, moments of variations in phase of frequency-keyed signal are separated by passing this signal through rejection filter whose rejection band entrapped frequency-keyed signal. ^ EFFECT: enhanced noise immunity of synchronization channel. ^ 1 cl, 2 dwg |
