| 摘要 |
PURPOSE:To recover stably a carrier wave by providing a discriminating means of a carrier wave recovery and synchronizing pattern part CR of a head part of a receiving burst signal, a bit timing regenerating and synchronizing pattern part BTR, a unique word part UW, and a data part DATA, and switching it to reverse modulation of the number of phases which has coincided with each number of modulation phases. CONSTITUTION:A receiving PSK signal (a) is applied to a demodulator 1, a carrier wave recovery circuit 2 and a bit timing regenerating circuit 5, a carrier wave (b) recovered by the carrier wave recovery circuit 2, and a bit terminal signal (c) regenerated by a bit timing regenerating circuit 5 are applied to the demodulator 1, and the receiving PSK signal (a) is demodulated. A demodulated signal (d) and the regenerated bit timing signal (c) are applied to a unique word detector 6, a unique word part UW is detected and applied to a phase number controlling circuit 7, and a time position of a carrier wave recovery and synchronizing pattern part CR and a bit timing regenerating and synchronizing pattern part BTR of the next burst signal is discriminated exactly. |
