Parameter estimator with dynamically variable integration time
First Claim
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1. A parameter estimator comprising:
- correlation logic for determining, using a dynamically variable integration time, a correlation function representing the correlation between a signal and one or more shifted versions of an identification code; and
analysis logic for analyzing the correlation function and estimating, responsive thereto, one or more parameter(s) other than the identification code relating to the signal.
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Abstract
A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.
39 Citations
39 Claims
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1. A parameter estimator comprising:
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correlation logic for determining, using a dynamically variable integration time, a correlation function representing the correlation between a signal and one or more shifted versions of an identification code; and analysis logic for analyzing the correlation function and estimating, responsive thereto, one or more parameter(s) other than the identification code relating to the signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A parameter estimator comprising:
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correlation means for determining, using a dynamically variable integration time, a correlation function representing the correlation between a signal and one or more shifted versions of an identification code; and analysis means for analyzing the correlation function and estimating, responsive thereto, one or more parameter(s) other than the identification code relating to the signal.
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8. A method of estimating one or more parameter(s) of a signal using a dynamically variable integration time comprising:
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determining, using a first integration time, a first correlation function representing the correlation between a first signal and one or more shifted versions of a first identification code; estimating, responsive to the first correlation function, one or more parameter(s) relating to the first signal; determining, using a second integration time which may differ from the first integration time, a second correlation function representing the correlation between a second signal and one or more shifted versions of a second identification code; and estimating, responsive to the second correlation function, one or more parameter(s) other than the identification code relating to the second signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of estimating one or more parameter(s) of a signal using a dynamically variable integration time comprising:
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determining, using a first integration time, a first correlation function representing the correlation between a signal and one or more shifted versions of an identification code; attempting to estimate, responsive to the first correlation function, one or more parameter(s) other than the identification code relating to the signal; and if the attempt is unsuccessful; determining, using a second integration time which may differ from the first integration time, a second correlation function representing the correlation between the signal and one or more shifted versions of the identification code; and attempting to estimate, responsive to the second correlation function, the one or more parameter(s) other than the identification code relating to the signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 37, 38, 39)
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25. A method of estimating one or more parameter(s) relating to signal using a dynamically variable integration time comprising:
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determining, using a first integration time, a first correlation function representing the correlation between a signal and an identification code; determining, responsive to the first correlation function, a second integration time which may differ from the first integration time; determining, using the second integration time, a second correlation function representing the correlation between the signal and the identification code; and attempting to estimate, responsive to the second correlation function, one or more parameter(s) relating to the signal. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of estimating one or more parameter(s) of a signal using a dynamically variable integration time comprising:
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a step for determining, using a first integration time, a first correlation function representing the correlation between a first signal and one or more shifted versions of a first identification code; a step for estimating, responsive to the first correlation function, one or more parameter(s) other than the identification code relating to the first signal; a step for determining, using a second integration time which may differ from the first integration time, a second correlation function representing the correlation between a second signal and one or more shifted versions of a second identification code; and a step for estimating, responsive to the second correlation function, one or more parameter(s) other than the identification code relating to the second signal.
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35. A method of estimating one or more parameters of a signal using a dynamically variable integration time comprising:
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a step for determining, using a first integration time, a first correlation function representing the correlation between a signal and one or more shifted versions of an identification code; a step for attempting to estimate, responsive to the first correlation function, one or more parameter(s) other than the identification code relating to the signal; and if the attempt is unsuccessful; a step for determining, using a second integration time which may differ from the first integration time, a second correlation function representing the correlation between the signal and one or more shifted versions of the identification code; and a step for attempting to estimate, responsive to the second correlation function, the one or more parameter(s) other than the identification code relating to the signal.
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36. A method of estimating one or more parameter(s) relating to signal using a dynamically variable integration time comprising:
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a step for determining, using a first integration time, a first correlation function representing the correlation between a signal and an identification code a step for determining, responsive to the first correlation function, a second integration time which may differ from the first integration time; a step for determining, using the second integration time, a second correlation function representing the correlation between the signal and the identification code; and a step for attempting to estimating, responsive to the second correlation function, one or more parameter(s) relating to the signal.
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Specification