| 摘要 |
PURPOSE:To suppress phase jitter without incurring amplification of undesired noise by detecting a phase jitter frequency and applying phase correction to only a reception signal of the frequency. CONSTITUTION:A phase error calculation circuit 6 obtains a phase error thetaE, a phase error signal (a) is inputted to plural band pass filters 8 and separated into a frequency component of each filter. A jitter frequency identification circuit 9 calculates power of an output signal of each band filter 8, resulting in selecting an output signal with the largest power. A conversion circuit 12 converts a signal from an adder 11 into a phase correction angle signal (b) and outputs the signal to a complex number multiplier 2. The complex number multiplier 2 multiplies the phase correction angle signal (b) with a complex number base band signal, applies phase correction to eliminate a phase jitter. Thus, the phase jitter is suppressed without incurring amplification of undesired noise. |
