| 摘要 |
PURPOSE:To reject the constrictions of PSK signal, by using a phase control circuit which controls the rapid amplitude change of PSK signal into smooth amplitude change. CONSTITUTION:''1'', ''0'' signals (a) are modulated into (b) at the PSK modulation section PM. At the changing point of the input information, since the phase of PSK signal rapidly changes, the signal (c) has constrictions even through the band pass filter BPF. To reject the constrictions, it is inputted to the phase detector PHD of the phase control section POS, and the amplitude change gradually produces with the operation of the loop of low pass filter LPF-voltage controlled oscillator VCO- PHD to smooth constrictions caused in the signal (c). Further, the amplitude of envelope of output is almost constant as the signal (d). |
