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 receiver comprising:
Doppler frequency determination circuitry operable to determine the Doppler frequency of a received signal;
signal mode detection circuitry operable to determine a modulation scheme of said received signal; and
control circuitry operable to control power consumption of said receiver based on said Doppler frequency of said received signal and said mode of said received signal.
2. The receiver of claim 1 , wherein said control of said power consumption comprises control of how often channel estimation and/or equalization is performed in said receiver.
3. The receiver of claim 1 , wherein said determination of said modulation scheme of said received signal comprises determination of a modulation order used for said received signal.
4. The receiver of claim 1 , wherein said mode detection circuitry determines a coding scheme used for said received signal.
5. The receiver of claim 1 , wherein a determination of signal quality of said received signal comprises determination of one or both of a bit error rate and a packet error rate of said received signal.
6. The receiver of claim 1 , wherein a determination of signal quality of said received signal comprises determination of signal to noise ratio.
7. The receiver of claim 2 , wherein:
said control of how often channel estimation and/or equalization is performed in said receiver comprises an increase of how often channel estimation and/or equalization is performed when said Doppler frequency is a first frequency and a decrease of how often channel estimation and/or equalization is performed when said Doppler frequency is a second frequency, where said first frequency is higher than said second frequency.
8. The receiver of claim 1 , comprising blocker determination circuitry operable to determine a strength and frequency of one or more blocker signals.
9. The receiver of claim 1 , wherein said control of said power consumption comprises control of a supply power provided to one or more of: an amplifier of said receiver, a local oscillator of said receiver, a filter of said receiver and an analog-to-digital converter of said receiver.
10. The receiver of claim 1 , wherein said control of said power consumption is based on one or more of: a noise figure, linearity, maximum signal swing, and phase noise in said receiver.
11. A method comprising:
performing in an electronic receiver:
determining, by Doppler frequency determination circuitry of said receiver, the Doppler frequency of a received signal;
determining, by signal mode detection circuitry of said receiver, a modulation scheme of said received signal; and
controlling, by control circuitry of said receiver, power consumption of said receiver based on said Doppler frequency of said received signal and said mode of said received signal.
12. The method of claim 11 , wherein said controlling said power consumption comprises controlling how often channel estimation and/or equalization is performed in said receiver.
13. The method of claim 11 , wherein said determining said modulation scheme of said received signal comprises determining of a modulation order used for said received signal.
14. The method of claim 11 , wherein said determining said mode detection circuitry determines a coding scheme used for said received signal.
15. The method of claim 11 , comprising determining a signal quality of said received signal by determining one or both of a bit error rate and a packet error rate of said received signal.
16. The method of claim 11 , comprising determining a signal quality of said received signal by determining signal to noise ratio.
17. The method of claim 12 , wherein:
said controlling how often channel estimation and/or equalization is performed in said receiver comprises increasing how often channel estimation and/or equalization is performed when said Doppler frequency is a first frequency and decreasing how often channel estimation and/or equalization is performed when said Doppler frequency is a second frequency, where said first frequency is higher than said second frequency.
18. The method of claim 11 , comprising determining, by blocker determination circuitry of said receiver, a strength and frequency of one or more blocker signals.
19. The method of claim 11 , wherein said control of said power consumption comprises controlling supply power provided to one or more of: an amplifier of said receiver, a local oscillator of said receiver, a filter of said receiver and an analog-to-digital converter of said receiver.
20. The method of claim 11 , wherein said controlling said power consumption is based on one or more of: a noise figure, linearity, maximum signal swing, and phase noise in said receiver.