Radio receiver
First Claim
1. A radio receiver unit comprising:
- receiving means for receiving RF (radio frequency) signals;
a filter arranged in a stage succeeding said receiving means and is capable of being turned on or off;
estimating means for estimating the magnitude of electric power of interference waves contained in said RF signals and for producing an estimated value corresponding to the magnitude of said electric power; and
control means for turning said filter off during a period in which said estimated value is smaller than a threshold value.
1 Assignment
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Accused Products
Abstract
A radio receiver unit which permits the electric power to be consumed in decreased amounts by a filter that suppresses the interference waves yet maintaining a quality of reception. The radio receiver unit has a FIR filter 16 for removing interference waves in a stage succeeding a receiving circuit unit 11 that receives RF signals containing desired waves and interference waves, and includes an interference wave power estimating unit 20 for estimating the magnitude of electric power of interference waves from the signal power measured by power measuring units 18, 19 and input to, and output from, the filter 16. When the estimated value of interference wave power is smaller than a threshold value, a control unit 21 turns the FIR filter 16 off.
53 Citations
11 Claims
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1. A radio receiver unit comprising:
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receiving means for receiving RF (radio frequency) signals;
a filter arranged in a stage succeeding said receiving means and is capable of being turned on or off;
estimating means for estimating the magnitude of electric power of interference waves contained in said RF signals and for producing an estimated value corresponding to the magnitude of said electric power; and
control means for turning said filter off during a period in which said estimated value is smaller than a threshold value. - View Dependent Claims (3, 4, 5, 6, 7, 8, 11)
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2. A radio receiver unit comprising:
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receiving means for receiving RF signals;
a filter arranged in a stage succeeding said receiving means and is capable of being turned on or off;
demodulating means for demodulating first received signals of before passing through said filter or for demodulating second received signals after having passed through said filter;
estimating means for estimating the magnitude of electric power of interference waves contained in said RF signals and for producing an estimated value corresponding to said magnitude; and
control means for so controlling said filter as to be turned off during a period in which said estimated value is smaller than a threshold value.
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9. A radio receiver unit capable of changing the operation mode over to a normal power consumption mode or to a low power consumption mode in which the consumption of electric power is small during the operation, comprising:
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receiving means for receiving RF signals that contain desired waves;
a filter arranged in a stage succeeding said receiving means and is capable of being turned on or off; and
control means for turning said filter off during said low power consumption mode.
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10. A radio receiver unit capable of changing the operation mode over to a normal power consumption mode or to a low power consumption mode in which the consumption of electric power is small during the operation, comprising:
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receiving means for receiving RF signals;
a filter arranged in a stage succeeding said receiving means;
demodulating means for demodulating first received signals of before passing through said filter or for demodulating second received signals after having passed through said filter; and
control means for so controlling said filter as to be turned off during said low power consumption mode.
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Specification