| 摘要 |
PURPOSE:To simplify the filter constitution, by forming sinNtheta and cosNtheta from the phase detection output theta of PSK signal, and frequency dividing 1/N after rotating Ntheta the phase of oscillator through a low pass filter. CONSTITUTION:The PSK signal and the output of a reference oscillation circuit 11 are fed to an operation processing circuit 10 to output sinNtheta and cosNtheta. sinNtheta and cosNtheta are fed to an infinite phase device 13 through low pass filters 15, 16 and the output of the oscillation circuit 11 is rotated by Ntheta. The signal turned is frequency- divided by 1/N frequency dividing circuit 14, and PSK signal and the reproducing carrier are output to the terminal 2. |
