DIGITAL DEMODULATING APPARATUS, DIGITAL RECEIVER, CONTROLLING METHOD OF THE APPARATUS, COMPUTER PROGRAM PRODUCT, AND RECORDING MEDIUM RECORDING THEREON THE PRODUCT
First Claim
1. A digital demodulating apparatus comprising:
- an intensity changing unit that changes the intensity of a received signal;
a channel selecting unit that applies channel selection processing to the signal whose intensity has been changed by the intensity changing unit;
a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel selection processing;
a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and
a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit.
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Accused Products
Abstract
A digital demodulating apparatus includes an intensity changing unit that changes the intensity of a received signal; a channel selecting unit that applies channel selection processing to the signal whose intensity has been changed by the intensity changing unit; a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel selection processing; a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit.
11 Citations
15 Claims
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1. A digital demodulating apparatus comprising:
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an intensity changing unit that changes the intensity of a received signal; a channel selecting unit that applies channel selection processing to the signal whose intensity has been changed by the intensity changing unit; a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel selection processing; a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A digital receiver comprising:
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an intensity changing unit that changes the intensity of a received signal; a channel selecting unit that applies channel selection processing to the signal whose intensity has been changed by the intensity changing unit; a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel selection processing; a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit, the receiver reproducing data including at least one of character data, image data, and sound data, on the basis of the signal from the demodulating unit.
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13. A controlling method of a digital demodulating apparatus that applies channel select processing and demodulation processing to a received signal,
the method comprising: -
an intensity changing step of changing the intensity of the received signal before channel select processing is applied; a noise evaluating step of evaluating an influence of noise components on a desired component in the signal to which demodulation processing is applied; and a gain changing step of changing, on the basis of a result of the evaluation in the noise evaluating step, the gain of the change in the intensity of the received signal in the intensity changing step so that the influence of the noise components is decreased in the signal to which demodulation processing is applied.
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14. A computer program product for a digital demodulating apparatus comprising a channel selecting unit that applies channel select processing to a received signal, and a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel select processing,
the product causing the apparatus to function as: -
an intensity changing unit that changes the intensity of the received signal before the channel selecting unit applies channel selecting processing; a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit.
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15. A computer-readable recording medium recording thereon a computer program product for a digital demodulating apparatus comprising a channel selecting unit that applies channel select processing to a received signal, and a demodulating unit that applies demodulation processing to the signal to which the channel selecting unit has applied channel select processing,
the product causing the apparatus to function as: -
an intensity changing unit that changes the intensity of the received signal before the channel selecting unit applies channel selecting processing; a noise evaluating unit that evaluates an influence of noise components on a desired component in the signal to be input to the demodulating unit; and a gain changing unit that changes, on the basis of a result of the evaluation by the noise evaluating unit, the gain of the change in the intensity of the received signal by the intensity changing unit so that the influence of the noise components is decreased in the signal to be input to the demodulating unit.
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Specification