Signal compensation device and communication apparatus
AssigneeFujitsu Limited
InventorNobuhisa Aoki
Life of this patent
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Abstract
A signal-compensation device includes a band-limitation unit that performs band limitation on a signal based on a variably adjusted band-set value and externally transmits the signal subjected to the band limitation to an amplifier, a measurement unit that measures a signal level of each of first and second signal components of a feedback signal which is part of an output of the amplifier fed back by a feedback unit to the band-limitation unit, where the each of first and second signal components is based on at least one of a property of variability of the band-set value, a feedback of the feedback signal by the feedback unit, and a nonlinear distortion of the amplifier, and an adjustment unit that adjusts the band-set value based on the signal level of each of the first and second signal components.
Claims20
A signal-compensation device comprising:
- a band-limitation unit that performs band limitation on a signal based on a variably adjusted band-set value and externally transmits the signal subjected to the band limitation to an amplifier;
- a measurement unit that measures a signal level of each of first and second signal components of a feedback signal which is part of an output of the amplifier fed back by a feedback unit to the band-limitation unit, where the each of first and second signal components is based on at least one of a property of variability of the band-set value, a feedback of the feedback signal by the feedback unit, and a nonlinear distortion of the amplifier;
- and
- an adjustment unit that adjusts the band-set value based on the signal level of each of the first and second signal components.
A communication apparatus comprising:
- a signal-compensation device;
- and
- an amplifier configured to perform amplification processing,
- wherein the signal-compensation device includes:
- a band-limitation unit that performs band limitation on a signal based on a variably adjusted band-set value and externally transmits the signal subjected to the band limitation to the amplifier;
- a measurement unit that measures a signal level of each of first and second signal components of a feedback signal which is part of an output of the amplifier fed back by a feedback unit to the band-limitation unit, where the each of first and second signal components is based on at least one of a property of variability of the band-set value, a feedback of the feedback signal by the feedback unit, and a nonlinear distortion of the amplifier;
- and
- an adjustment unit that adjusts the band-set value based on the signal level of each of the first and second signal components.
A signal-compensation method comprising:
- performing band limitation on a signal based on a variably adjusted band-set value and externally transmitting the signal subjected to the band limitation to an amplifier;
- measuring a signal level of each of first and second signal components of a feedback signal which is part of an output of the amplifier fed back by a feedback unit to the performing band limitation, where the each of first and second signal components is based on at least one of a property of variability of the band-set value, a feedback of the feedback signal by the feedback unit, and a nonlinear distortion of the amplifier;
- and
- adjusting the band-set value based on the signal level of each of the first and second signal components.
Dependencies are inferred from the claim text.