Power management in digital receivers that adjusts at least one a of clock rate and a bit width based on received signal
First Claim
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1. A method for managing power in a receiver that receives a signal from a transmitter, comprising the steps of:
- determining whether the transmitter has completed transmission of a previous signal;
determining minimum acceptable values of one or more operating parameters of one or more of a plurality of components of a demodulator of the receiver according to an operating mode of the transmitter as determined by the demodulator and a characteristic of a received signal from the transmitter; and
adjusting one or more of the operating parameter of the one or more components to the minimum acceptable values of the operating parameters, the adjustment made on a time slice boundary between the received signal and the previous signal;
wherein the one or more operating parameters is at least one of a clock rate and a bit width.
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Abstract
Methods and systems consistent with the present invention provide a method for dynamically controlling power consumption in a digital demodulator circuit by varying clock rates and bit widths of demodulator components including an analog to digital converter, decimation filter, OFDM operating engine, FEC decoder, and MPE-FEC processor, according to parameters and conditions of the received signal including modulation mode, signal to noise ratio, effective bit transmission rate, bit error rate, packet error rate, adjacent channel interference, and co-channel interference.
50 Citations
23 Claims
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1. A method for managing power in a receiver that receives a signal from a transmitter, comprising the steps of:
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determining whether the transmitter has completed transmission of a previous signal; determining minimum acceptable values of one or more operating parameters of one or more of a plurality of components of a demodulator of the receiver according to an operating mode of the transmitter as determined by the demodulator and a characteristic of a received signal from the transmitter; and adjusting one or more of the operating parameter of the one or more components to the minimum acceptable values of the operating parameters, the adjustment made on a time slice boundary between the received signal and the previous signal; wherein the one or more operating parameters is at least one of a clock rate and a bit width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for managing power in a receiver that receives a signal from a transmitter, wherein the receiver includes a demodulator comprising a plurality of components, the method comprising the steps of:
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determining whether the transmitter has completed transmission of a previous signal; determining an operating mode of the transmitter based on a received signal; determining a minimum operating parameter of one of the plurality of components, wherein the minimum operating parameter is based on the operating mode; and adjusting an operating parameter of the component to the minimum operating parameter, the adjustment made on a time slice boundary between the received signal and the previous signal; wherein the one or more operating parameters is at least one of a clock rate and a bit width. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for managing power in a receiver that receives a signal from a transmitter, wherein the receiver includes a demodulator comprising a plurality of components, the method comprising the steps of:
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determining whether the transmitter has completed transmission of a previous signal; measuring a characteristic of a received signal; determining a minimum operating parameter of one of the plurality of components, wherein the minimum operating parameter is based on the characteristic; and adjusting an operating parameter of the component to the minimum operating parameter, the adjustment made on a time slice boundary between the received signal and the previous signal; wherein the minimum operating parameter is at least one of a clock rate and a bit width. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification