| 摘要 |
PURPOSE:To establish both carrier phase synchronism and word cynchronism at the same time, by controlling a word phase and carrier phase by attaining the synchronization so that the vector through the combination of time slots will not be detected at the reception side. CONSTITUTION:In the phase indeterminacy removing system which removes carrier-phase indeterminacy and word-phase indeterminacy on the three-phase modulation system, a three-phase modulation input is supplied to three-phases modulator 1, modulated data (d1), (d2) and (d3) are applied to occurrence establishing discriminators 4a, 4b and 4c respectively, and respective outputs are applied to change-over switch driver 5. Then, the output of driver 5 is applied to change- over switch 3 supplied with modulated data (d1) to (d3), and also to synchronous signal generator 2 supplied with words from modulator 1, and the output of generator 2 is applied to discriminators 4a to 4c. Next, the output of switch 3 and the output of generator 2 are both applied to ternary-binary converter 6, and the combination of time slots is so made that the vector will not be detected at the reception side. |
