| 摘要 |
PURPOSE:To reduce the effect of confusion due to mixing intrusion of pulse mode noise by retarding a detection signal having a change of a prescribed value or over of a reception data amplitude and using this signal to select a signal attenuating an error different from an ideal value as a correction signal. CONSTITUTION:A reception data signal RD is inputted to a data register 1, shifted by one time slot and each element is multiplied with a correction amount stored in a correction register 2 by a multiplier 3 and the multiplied output is inputted to an adder 5. The output of the adder 5 is a signal RD' equalizing and compensating the signal RD and the error with an ideal value is detected by a discriminator 6. When an impulse noise is mixed to the signal RD and the amplitude of the signal RD is increased momentarily, a signal detecting 7 the change is discriminated 8 larger than a prescribed value, then the signal with a large amplitude subject to discrimination 8 is subject to prescribed time delay 9. The delayed 9 signal selects 10 a signal attenuating 12 the error signal from the discriminator 6, the result is fed to a correction circuit 4, added to the correction of the register 2 to minimize the error correction. |
