Parameter estimator with dynamically variable integration time
First Claim
Patent Images
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, at least one parameter other than the identification code relating to the signal, wherein the parameter estimator is configured to determine an integration time from an analysis of a correlation function derived from the signal using a default integration time.
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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
32 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, at least one parameter other than the identification code relating to the signal, wherein the parameter estimator is configured to determine an integration time from an analysis of a correlation function derived from the signal using a default integration time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 the 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) 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; attempting to estimate, responsive to the second correlation function, the one or more parameter(s) relating to the signal; and iterating until the one or more parameter(s) are estimated, or it is determined that the one or more parameter(s) cannot be estimated from the signal.
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8. A method of estimating one or more parameter(s) relating to 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 the 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 (9, 10, 11, 12, 13, 14)
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15. A method of estimating one or more parameter(s) relating to 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 the 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 estimate, responsive to the second correlation function, one or more parameter(s) relating to the signal.
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16. A processor-readable medium encoded with processor- executable instructions for, when executed by a processor, estimating one or more parameter(s) of a signal using a dynamically variable integration time, comprising:
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instructions 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; instructions for estimating, responsive to the first correlation function, one or more parameter(s) relating to the first signal; instructions 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 instructions for estimating, responsive to the second correlation function, one or more parameter(s) relating to the second signal.
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17. A processor-readable medium encoded with processor- executable instructions for, when executed by a processor, estimating one or more parameter(s) of a signal using a dynamically variable integration time, comprising:
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instructions for determining, using a first integration time, a first correlation function representing the correlation between the signal and one or more shifted versions of an identification code; instructions for attempting to estimate, responsive to the first correlation function, one or more parameter(s) relating to the signal; and if the attempt is unsuccessful; instructions 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 instructions for attempting to estimate, responsive to the second correlation function, the one or more parameter(s) relating to the signal. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A processor-readable medium encoded with processor- executable instructions for, when executed by a processor, estimating one or more parameter(s) relating to a signal using a dynamically variable integration time, comprising:
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instructions for determining, using a first integration time, a first correlation function representing the correlation between the signal and an identification code; instructions for determining, responsive to the first correlation function, a second integration time which may differ from the first integration time; instructions for determining, using the second integration time, a second correlation function representing the correlation between the signal and the identification code; and instructions for attempting to estimate, responsive to the second correlation function, one or more parameter(s) relating to the signal.
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24. A server including computer executable instructions stored thereon for, when executed by a computer, estimating one or more parameter(s) of a signal using a dynamically variable integration time, comprising:
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instructions 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; instructions for estimating, responsive to the first correlation function, one or more parameter(s) relating to the first signal; instructions 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 instructions for estimating, responsive to the second correlation function, one or more parameter(s) relating to the second signal.
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25. A server including computer executable instructions stored thereon for, when executed by a computer, estimating one or more parameter(s) of a signal using a dynamically variable integration time, comprising:
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instructions for determining, using a first integration time, a first correlation function representing the correlation between the signal and one or more shifted versions of an identification code; instructions for attempting to estimate, responsive to the first correlation function, one or more parameter(s) relating to the signal; and if the attempt is unsuccessful; instructions 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 shifled versions of (he identification code; and instructions for attempting to estimate,. responsive to the second correlation function, the one or more parameter(s) relating to the signal.
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26. A server including computer executable instructions stored thereon for, when executed by a computer, estimating one or more parameter(s) relating to a signal using a dynamically variable integration time, comprising:
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instructions for determining, using a first integration time, a first correlation function representing the correlation between the signal and an identification code; instructions for determining, responsive to the first correlation function, a second integration time which may differ from the first integration time; instructions for determining, using the second integration time, a second correlation function representing the correlation between the signal and the identification code; and
instructions for attempting to estimate, responsive to the second correlation function, one or more parameter(s) relating to the signal.
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27. A parameter estimator for estimating one or more parameter(s) of a signal using a dynamically variable integration time has been comprising:
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means for determining, using a first integration time, a first correlation function representing a correlation between a signal and one or more shifted versions of an identification code; means for attempting to estimate, responsive to the first correlation function, at least one parameter relating to the signal; means for determining, if the attempt is unsuccessful and 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 means for attempting to estimate, responsive to the second correlation function, the at least one parameter relating to the signal. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification