Method and system for broadband analog to digital converter technology
View Patent ↗Nonlinearity correction in a device that performs analog-to-digital conversion on received analog signals, may be calibrated by generating correction-parameters estimation which when applied to the total spectral content reduces distortion resulting from said nonlinearity in originally-unoccupied spectral regions. Digital signals generated based on sampling of the received analog signals may then be corrected, to remove nonlinearity related distortion, based on the estimated correction-parameters. The nonlinearity calibration may be performed during reception and handling of said analog signals. The correction-parameters may be generated based on signals located in particular spectral regions, such as the originally-unoccupied spectral regions. These signals may be injected within the device, into the particular spectral regions, and the signal may have known characteristics to enable estimating the required correction.
1. A method, comprising:
in a device that performs analog-to-digital conversion, calibrating nonlinearity associated with analog-to-digital conversion of received analog signals, said calibrating comprises generating correction estimation parameters, wherein applying said correction estimation parameters to total spectral content reduces distortion in originally-unoccupied spectral regions, said distortion resulting from said nonlinearity; and
correcting based on said correction estimation parameters, digital signals generated based on sampling of said received analog signals.
2. The method according to claim 1 , comprising performing said calibration during reception and handling of said analog signals.
3. The method according to claim 1 , comprising generating said correction estimation parameters based on signals in particular spectral regions.
4. The method according to claim 3 , wherein said particular spectral regions correspond to said originally-unoccupied spectral regions.
5. The method according to claim 3 , comprising injecting specific signals in said particular spectral regions.
6. The method according to claim 5 , comprising generating said correction estimation parameters based on said injected specific signals.
7. The method according to claim 3 , comprising isolating signals located in said particular spectral regions, wherein said correction estimation parameters are generated based on said isolated signals.
8. The method according to claim 7 , comprising isolating said signals located in said particular spectral regions after said correcting of said digital signals.
9. A system, comprising:
one or more circuits for use in a device that performs analog-to-digital conversion, said one or more circuits being operable to calibrate nonlinearity associated with analog-to-digital conversion of received analog signals, said calibrating comprises generating correction estimation parameters, wherein applying said correction estimation parameters to total spectral content reduces distortion in originally-unoccupied spectral regions, said distortion resulting from said nonlinearity; and
said one or more circuits being operable to correct based on said correction estimation parameters, digital signals generated based on sampling of said received analog signals.
10. The system according to claim 9 , wherein said or more circuits are operable to perform said calibration during reception and handling of said analog signals.
11. The system according to claim 9 , wherein said or more circuits are operable to generate said correction estimation parameters based on signals in particular spectral regions.
12. The system according to claim 11 , wherein said particular spectral regions correspond to said originally-unoccupied spectral regions.
13. The system according to claim 11 , wherein said or more circuits are operable to inject specific signals in said particular spectral regions.
14. The system according to claim 13 , wherein said or more circuits are operable to generate said correction estimation parameters based on said injected specific signals.
15. The system according to claim 11 , wherein said or more circuits are operable to isolate signals located in said particular spectral regions, and said correction estimation parameters are generated based on said isolated signals.
16. The system according to claim 15 , wherein said one or more circuits are operable to isolate said signals located in said particular spectral regions after said correcting of said digital signals.