Calibrating a transmit diversity communication device
View Patent ↗Calibrating a transmit diversity device includes establishing diversity parameter values of diversity parameters for a plurality of signals, where each signal is transmitted from a channel of the transmit diversity device. The following are performed for each diversity parameter value to yield associations: determining a modification parameter value that yields a diversity parameter value, where a modification parameter value describes modulation of a feature of at least one signal; and associating the modification parameter value with the diversity parameter value to yield an association. Calibration data is generated in accordance with the associations.
1. A method for calibrating a transmit diversity device, comprising:
establishing one or more diversity parameter values of one or more diversity parameters for a plurality of signals, each of the plurality of signals transmitted from a channel of a plurality of channels of said transmit diversity device by establishing at least one or more power ratio values of a power ratio;
performing the following for each of the one or more diversity parameter values to yield one or more associations:
determining based at least on said power ratio values one or more modification parameter values that yield a diversity parameter value, a modification parameter value of a modification parameter describing modulation of a feature of at least one signal of the plurality of signals; and
associating the one or more modification parameter values with the diversity parameter value to yield an association for said diversity parameter value;
generating calibration data in accordance with the one or more associations; and calibrating said transmit diversity device using said calibration data.
2. The method of claim 1 , wherein said determining one or more modification parameter values that yield said diversity parameter value further comprises:
measuring a relative feature of the plurality of signals, the relative feature describing a feature of a first signal of the plurality of signals with respect to the feature of a second signal of the plurality of signals.
3. The method of claim 1 , wherein:
said determining one or more modification parameter values that yield a diversity parameter value further comprises:
measuring a variation of the power ratio value with respect to an operating condition; and
determining an adjustment in accordance with the variation.
4. The method of claim 3 , wherein the operating condition comprises at least one of a temperature and a frequency.
5. The method of claim 1 , wherein:
said establishing one or more diversity parameter values of one or more diversity parameters for a plurality of signals further comprises:
establishing one or more phase difference values of a phase difference; and
said determining one or more modification parameter values that yield a diversity parameter value further comprises:
determining a modification parameter value that yields a phase difference value.
6. The method of claim 1 , wherein:
said determining one or more modification parameter values that yield a diversity parameter value further comprises:
determining a modification parameter value that yields a power ratio value.
7. The method of claim 1 , wherein:
said establishing one or more diversity parameter values of one or more diversity parameters for a plurality of signals further comprises:
establishing one or more phase difference values, given a power ratio value; and
said determining one or more modification parameter values that yield a diversity parameter value further comprises:
determining a modification parameter value that yields a phase difference value, given the power ratio value.
8. The method of claim 1 , further comprising:
providing the calibration data to the transmit diversity device in real time.
9. The method of claim 1 , further comprising:
providing the calibration data to the transmit diversity device as a batch file.
10. A calibrator for calibrating a transmit diversity device, comprising:
an interface operable to:
receive a plurality of signals, each of the plurality of signals transmitted from a channel of a plurality of channels of a transmit diversity device; and
a processor coupled to the interface and operable to:
establish one or more diversity parameter values of one or more diversity parameters for the plurality of signals at least by establishing one or more power ratio values of a power ratio;
perform the following for each of the one or more diversity parameter values to yield one or more associations:
determine based at least on said power ratio values one or more modification parameter values that yield a diversity parameter value, a modification parameter value of a modification parameter describing modulation of a feature of at least one signal of the plurality of signals; and
associate the one or more modification parameter values with the diversity parameter value to yield an association; and
generate calibration data in accordance with the one or more associations.
11. The calibrator of claim 10 , the processor further operable to determine one or more modification parameter values that yield a diversity parameter value by:
measuring a relative feature of the plurality of signals, the relative feature describing a feature of a first signal of the plurality of signals with respect to the feature of a second signal of the plurality of signals.
12. The calibrator of claim 10 , the processor further operable to:
determine one or more modification parameter values that yield a diversity parameter value by:
measuring a variation of the power ratio value with respect to an operating condition; and
determining an adjustment in accordance with the variation.
13. The calibrator of claim 12 , wherein the operating condition comprises at least one of a temperature and a frequency.
14. The calibrator of claim 10 , the processor further operable to:
establish one or more diversity parameter values of one or more diversity parameters for a plurality of signals by:
establishing one or more phase difference values of a phase difference; and
determine one or more modification parameter values that yield a diversity parameter value by:
determining a modification parameter value that yields a phase difference value.
15. The calibrator of claim 10 , the processor further operable to:
determine one or more modification parameter values that yield a diversity parameter value by:
determining a modification parameter value that yields a power ratio value.
16. The calibrator of claim 10 , the processor further operable to:
establish one or more diversity parameter values of one or more diversity parameters for a plurality of signals by:
establishing one or more phase difference values, given a power ratio value; and
determine one or more modification parameter values that yield a diversity parameter value by:
determining a modification parameter value that yields a phase difference value, given the power ratio value.
17. The calibrator of claim 10 , the processor further operable to:
provide the calibration data to the transmit diversity device in real time.
18. The calibrator of claim 10 , the processor further operable to:
provide the calibration data to the transmit diversity device as a batch file.