Analogue-to-digital converter (ADC) dynamic range and gain control
View Patent ↗The present invention relates to a method for using the peak-to-average power ratio (PAR) of signals received by a receiver to control the gain of the receiver for an analogue-to-digital converter (ADC) and/or to control the dynamic range of the ADC.
1. A method of processing a signal, comprising:
determining average power of the signal;
determining peak-to-average power ratio (PAR) of the signal;
amplifying the signal based at least in part on the PAR in conjunction with the average power; and
converting the amplified signal from analogue into digital.
2. A method as claimed in claim 1 wherein the PAR is determined at least in part by detecting whether the signal is unwanted.
3. A method as claimed in claim 2 wherein the signal is detected as unwanted based at least in part on the strength of the received signal.
4. A method as claimed in claim 1 wherein the signal is detected as unwanted based at least in part on the average power over a wide frequency band.
5. A method as claimed in claim 1 wherein the signal is detected as unwanted based at least in part on monitoring a narrow frequency band where unwanted signals are likely to appear.
6. A method as claimed in claim 1 wherein the PAR is determined by using a peak detector.
7. A method of processing a signal, comprising:
determining average power of the signal;
determining peak-to-average power ratio (PAR) of the signal;
configuring a dynamic range for an analogue-to-digital converter based at least in part on the PAR in conjunction with the average power; and
converting the signal from analogue into digital using the analogue-to-digital converter.
8. A method as claimed in claim 7 wherein the PAR is determined at least in part by detecting whether the signal is unwanted.
9. A method as claimed in claim 8 wherein the signal is detected as unwanted based at least in part on the strength of the received signal.
10. A method as claimed in claim 8 wherein the signal is detected as unwanted based at least in part on the average power over a wide frequency band.
11. A method as claimed in claim 8 wherein the signal is detected as unwanted based at least in part on monitoring a narrow frequency band where unwanted signals are likely to appear.
12. A method as claimed in claim 7 wherein the PAR is determined by using a peak detector.
13. A signal processing apparatus, comprising:
a processing component arranged for determining an average power of a signal;
a processing component arranged for determining a peak-to-average power ratio (PAR) of a signal;
an amplification component arranged for amplifying a signal based on a determined peak-to-average power ratio (PAR) in conjunction with a determined average power;
and
an analogue to digital converter arranged for converting an amplified signal from analogue form into digital form.
14. A signal processing apparatus as claimed in claim 13 wherein the amplification component comprises a mixer and an analog filter.
15. A signal processing apparatus as claimed in claim 13 wherein the amplification component comprises an amplifier.
16. A signal processing apparatus as claimed in claim 13 wherein the processing component is arranged for determining the PAR at least in part by detecting whether the signal is unwanted.
17. A signal processing apparatus as claimed in claim 16 wherein the signal is detected as unwanted based at least in part on the strength of the received signal.
18. A signal processing apparatus as claimed in claim 16 wherein the signal is detected as unwanted based at least in part on the average power over a wide frequency band.
19. A signal processing apparatus as claimed in claim 16 wherein the signal is detected as unwanted based at least in part on monitoring a narrow frequency band where unwanted signals are likely to appear.
20. A signal processing apparatus as claimed in claim 13 wherein the processing component further comprises a peak detector arranged for determining the PAR.
21. A signal processing apparatus, comprising:
a processing component arranged for determining an average power of a signal;
a processing component arranged for determining a peak-to-average power ratio (PAR) of a signal;
and
an analogue to digital converter comprising a dynamic range configured at least in part using the peak-to-average power ratio in conjunction with the average power of the signal, and arranged for converting a signal from analogue form into digital form.
22. A signal processing apparatus as claimed in claim 21 wherein the processing component is arranged for determining the PAR at least in part by detecting whether the signal is unwanted.
23. A signal processing apparatus as claimed in claim 22 wherein the signal is detected as unwanted based at least in part on the strength of the received signal.
24. A signal processing apparatus as claimed in claim 22 wherein the signal is detected as unwanted based at least in part on the average power over a wide frequency band.
25. A signal processing apparatus as claimed in claim 22 wherein the signal is detected as unwanted based at least in part on monitoring a narrow frequency band where unwanted signals are likely to appear.
26. A signal processing apparatus as claimed in claim 21 wherein the processing component further comprises a peak detector arranged for determining the PAR.
27. A receiver comprising a signal processing apparatus, comprising:
a processing component arranged for determining an average power of a signal;
a processing component arranged for determining a peak-to-average power ratio (PAR) of a signal;
an amplification component arranged for amplifying a signal based on a determined peak-to-average power ratio (PAR) in conjunction with a determined average power;
and
an analogue to digital converter arranged for converting an amplified signal from analogue form into digital form.
28. A user equipment comprising a receiver as claimed in claim 27 .