Channel-sensitive power control
View Patent ↗A communication receiver which applies signal processing for quantitatively estimating receive signal factors such as communication channel quality, signal characteristics, and overall system received bit error rate (BER) or packet error rate (PER) and which applies a general algorithm for mapping these estimated factors to control receiver performance and minimize power consumption.
1. A system for power control, the system comprising:
a detector operable to generate a signal strength indication according to one or more signals from a receiver, wherein the detector is operable to estimate a Doppler frequency according to the one or more signals from the receiver;
an estimator operable to estimate a frequency and an amplitude of an interferer according to the signal strength indication; and
a controller operable to generate one or more control signals according to one or both of the frequency and the amplitude of the interferer, wherein the one or more control signals adjust power consumption in the receiver, and how frequently the one or more control signals are updated is based on said estimated Doppler frequency.
2. The system of claim 1 , wherein the receiver comprises an amplifier, a frequency synthesizer, a mixer and an analog-to-digital converter.
3. The system of claim 2 , wherein the detector receives the one or more signals from one or more of the amplifier, the frequency synthesizer, the mixer and the analog-to-digital converter.
4. The system of claim 2 , wherein the controller is operable to adjust the frequency synthesizer.
5. The system of claim 1 , wherein the receiver is operable to receive and process an incoming signal from a communication channel in a plurality of circuits to generate the one or more signals, thereby enabling an estimation of a communication channel quality.
6. The system of claim 1 , wherein the detector is operable to estimate a signal to noise ratio according to the one or more signals from the receiver.
7. The system of claim 1 , wherein the controller is operable to adjust the linearity of the receiver.
8. The system of claim 1 , wherein the controller is operable to adjust the phase noise of the receiver.
9. A method for power control, the method comprising:
generating a signal strength indication according to one or more signals from a receiver;
estimating a frequency and an amplitude of an interferer according to the signal strength indication;
estimating a Doppler frequency according to the one or more signals from the receiver;
generating one or more control signals according to one or both of the frequency and the amplitude of the interferer; and
adjusting power consumption in the receiver according to at least one of the one or more control signals, wherein the frequency of said adjusting is based on said estimated Doppler frequency.
10. The method of claim 9 , wherein the receiver comprises an amplifier, a frequency synthesizer, a mixer and an analog-to-digital converter.
11. The method of claim 10 , wherein method comprises receiving the one or more signals from one or more of the amplifier, the frequency synthesizer, the mixer and the analog-to-digital converter.
12. The method of claim 10 , wherein the method comprises adjusting the frequency synthesizer according to one or both of the frequency and the amplitude of the interferer.
13. The method of claim 9 , wherein the method comprises processing an incoming signal from a communication channel in a plurality of circuits to generate the one or more signals, thereby enabling an estimation of a communication channel quality.
14. The method of claim 9 , wherein the method comprises estimating a signal to noise ratio according to the one or more signals from the receiver.
15. The method of claim 9 , wherein the method comprises adjusting the linearity of the receiver according to at least one of the one or more control signals.
16. The method of claim 9 , wherein the method comprises adjusting the phase noise of the receiver according to at least one of the one or more control signals.