Method and system for signal quality measurement based on mean phase error magnitude of a signal
View Patent ↗Various aspects of a method and system from signal quality measurement based on mean phase error magnitude of a signal are presented. Aspects of the system may comprise circuitry that receives a time phase corrected Bluetooth signal via an RF channel. The circuitry may generate a phase error signal based on the received time phase corrected Bluetooth signal, and generate a mean phase error signal based on the generated phase error signal. A signal to noise ratio (SNR) may be derived based on the generated mean phase error signal, and a data rate may be selected based on the derived SNR.
1. A method for processing a radio frequency (RF) signal, the method comprising:
performing by one or more processors and/or circuits in a wireless device:
computing a phase error value based on a signal received via an RF channel;
computing a mean phase error value based on said computed phase error value; and
selecting a data rate based on said computed mean phase error value and a target signal to noise ratio for said received signal.
2. The method according to claim 1 , comprising selecting a modulation type based on said selected data rate.
3. The method according to claim 1 , comprising generating a time phase corrected signal based on said received signal and a generated time phase correction signal.
4. The method according to claim 3 , comprising computing said phase error value based on said generated time phase corrected signal.
5. The method according to claim 1 , comprising computing said phase error value based on one or both of a computed phase value and a computed angle value.
6. The method according to claim 5 , comprising computing said phase value based on said computed angle value and a computed reference phase value.
7. The method according to claim 6 , comprising computing said phase value based on a selected modulation type.
8. The method according to claim 6 , comprising computing said reference phase value based on at least one previously computed phase value.
9. The method according to claim 6 , comprising computing demodulated bits from said received signal based on said computed phase value and said computed reference phase value.
10. The method according to claim 9 , comprising:
computing a subsequent reference phase value based on said computed phase value; and
computing a subsequent phase value based on said computed subsequent reference phase value and a computed subsequent angle value.
11. The method according to claim 5 , comprising computing a phase rotation value based on said computed phase error value.
12. The method according to claim 11 , comprising computing said phase rotation value based on a computed weighted average value.
13. The method according to claim 12 , comprising computing said computed weighted average value based on said computed phase error value and one or more previously computed phase error values.
14. The method according to claim 13 , comprising computing said phase rotation value based on said computed weighted average value and one or more previously computed weighted average values.
15. The method according to claim 11 , comprising computing said angle signal based on said computed phase rotation value and a computed signal angle value.
16. The method according to claim 15 , comprising computing said signal angle value based on said received signal.
17. The method according to claim 15 , comprising computing said angle value based on a summation of said computed phase rotation value and said computed signal angle value.
18. The method according to claim 17 , comprising computing said angle value based on a modulus base value for said summation.
19. A system for processing a radio frequency (RF) signal, the system comprising:
one or more circuits that are operable to compute a phase error value based on a signal received via an RF channel;
said one or more circuits are operable to compute a mean phase error value based on said computed phase error value; and
said one or more circuits are operable to select a data rate based on said computed mean phase error value and a target signal to noise ratio for said received signal.
20. The system according to claim 19 , wherein said one or more circuits are operable to select a modulation type based on said selected data rate.
21. The system according to claim 19 , wherein said one or more circuits are operable to generate a time phase corrected signal based on said received signal and a generated time phase correction signal.
22. The system according to claim 21 , wherein said one or more circuits are operable to compute said phase error value based on said generated time phase corrected signal.
23. The system according to claim 19 , wherein said one or more circuits are operable to compute said phase error value based on one or both of a computed phase value and a computed angle value.
24. The system according to claim 23 , wherein said one or more circuits are operable to compute said phase value based on said computed angle value and a computed reference phase value.
25. The system according to claim 24 , wherein said one or more circuits are operable to compute said phase value based on a selected modulation type.
26. The system according to claim 24 , wherein said one or more circuits are operable to compute said reference phase value based on at least one previously computed phase value.
27. The system according to claim 24 , wherein said one or more circuits are operable to compute demodulated bits from said received signal based on said computed phase value and said computed reference phase value.
28. The system according to claim 27 , wherein said one or more circuits are operable to:
compute a subsequent reference phase value based on said computed phase value; and
compute a subsequent phase value based on said computed subsequent reference phase value and a computed subsequent angle value.
29. The system according to claim 23 , wherein said one or more circuits are operable to compute a phase rotation value based on said computed phase error value.
30. The system according to claim 29 , wherein said one or more circuits are operable to compute said phase rotation value based on a computed weighted average value.
31. The system according to claim 30 , wherein said one or more circuits are operable to compute said computed weighted average value based on said computed phase error value and one or more previously computed phase error values.
32. The system according to claim 31 , wherein said one or more circuits are operable to compute said phase rotation value based on said computed weighted average value and one or more previously computed weighted average values.
33. The system according to claim 29 , wherein said one or more circuits are operable to compute said angle signal based on said computed phase rotation value and a computed signal angle value.
34. The system according to claim 33 , wherein said one or more circuits are operable to compute said signal angle value based on said received signal.
35. The system according to claim 33 , wherein said one or more circuits are operable to compute said angle value based on a summation of said computed phase rotation value and said computed signal angle value.
36. The system according to claim 35 , wherein said one or more circuits are operable to compute said angle value based on a modulus base value for said summation.