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US 8,009,756 B2Granted
Peak suppressing and restoring method, transmitter, receiver, and peak suppressing and restoring system
AssigneeFujitsu Limited
InventorsHiroyoshi Ishikawa, Hajime Hamada, Nobukazu Fudaba, Yuichi Utsunomiya, Kazuo Nagatani
Life of this patent
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Abstract
A peak suppressing and restoring method includes suppressing a peak of a signal, starting suppression when a suppression start value is lower than a suppression target value, using a function of a gain characteristic such that a peak amplitude value attains the suppression target value, and restoring the suppressed peak of the signal using an inverse function of the function of the gain characteristic.
Claims10
A peak suppressing and restoring method comprising:
- suppressing, by a transmitter, a peak of a signal by starting suppression when a suppression start value is lower than a suppression target value and using a function of a gain characteristic such that a peak amplitude value attains the suppression target value;
- and
- restoring, by a receiver, the suppressed peak of the signal using an inverse function of the function of the gain characteristic that is stored in the receiver.
A transmitter comprising:
- a peak suppressing unit configured to start suppressing a peak of a signal when a suppression start value is lower than a suppression target value and to suppress the peak of the signal using a function of gain characteristics such that a peak amplitude value attains the suppression target value;
- and
- a transmission unit configured to transmit the signal, the peak of which is suppressed by the peak suppressing unit, to a receiver that stores an inverse function of the function of gain characteristics and restores the suppressed peak by the stored inverse function.
A receiver comprising:
- a reception unit configured to receive a signal, a peak of which is suppressed by a peak suppressing process, from a transmitter;
- and
- a peak restoring unit configured to store an inverse function of a function of a gain characteristic used in the peak suppressing process at the transmitter, and to restore the peak of the received signal by using the stored inverse function.
A peak suppressing and restoring system comprising:
- a transmitter that includes a peak suppressing unit configured to start suppression when a suppression start value is lower than a suppression target value and to suppress a peak using a function of a gain characteristic such that a peak amplitude value attains the suppression target value;
- and
- a receiver that includes a peak restoring unit configured to store an inverse function of the function of the gain characteristic used in the peak suppressing process at the transmitter, and to restore the peak suppressed by the peak suppressing unit by using the stored inverse function.
Dependencies are inferred from the claim text.