Antenna adaptation comparison method for high mobility
First Claim
Patent Images
1. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
- causing a scan angle of the antenna to change temporarily from a currentscan angle to at least one trial scan angle during reception of a Power Control Bit (PCB) with a dwell time that minimizes an impact to a forward link power control loop;
determining a trial metric associated with each trial scan angle; and
selecting a next scan angle based on the trial metrics.
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Abstract
A system causes a scan angle of a directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of predetermined portions of an information carrying signal. At the trial scan angle(s), a trial metric associated with each trial scan angle is determined by the system. The system then selects a next scan angle based on the trial metrics. Examples of predetermined portions of the information carrying signal include the Power Control Bit (PCB) and certain symbol periods of the Forward Error Correction (FEC) block.
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Citations
40 Claims
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1. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
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causing a scan angle of the antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a Power Control Bit (PCB) with a dwell time that minimizes an impact to a forward link power control loop; determining a trial metric associated with each trial scan angle; and selecting a next scan angle based on the trial metrics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 19)
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14. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
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causing a scan angle of the antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; determining a trial metric associated with each trial scan angle; selecting a next scan angle based on the trial metrics; determining a received channel parameter and changing a trial scan parameter based on the received channel parameter, the trial scan parameter including a scanning rate or adaptation rate.
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16. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
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causing a scan angle of the antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; determining a trial metric associated with each trial scan angle; selecting a next scan angle based on the trial metrics; determining a received channel parameter and changing a trial scan parameter based on the received channel parameter, the received channel parameter being an Automatic Gain Control (AGC) level crossing rate or variance.
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17. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
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causing a scan angle of the antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; determining a trial metric associated with each trial scan angle; selecting a next scan angle based on the trial metrics; determining a received channel parameter and changing a trial scan parameter based on the received channel parameter, the received channel parameter being based on pilot channel received parameters including at least one of the following;
level crossing rate of an envelope of a correlated pilot signal, variance of the envelope of the correlated pilot signal, statistical function of the envelope of the correlated pilot signal, slew rate of the code phase of the pilot signal, phase of the pilot signal, variance of the pilot signal, or rate of change of the pilot signal.
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18. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
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causing a scan angle of the antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; determining a trial metric associated with each trial scan angle; selecting a next scan angle based on the trial metrics; detecting when direction selection is non-beneficial; and setting the adaptive antenna into an omni-directional mode.
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20. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a Power Control Bit (PCB) with a dwell time that minimizes an impact to a forward link power control loop; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 38)
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33. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics, the processor receiving a channel parameter and changing a trial scan parameter based on the received channel parameter, the trial scan parameter including a scanning rate or adaptation rate.
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35. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics, the processor receiving a channel parameter and changing a trial scan parameter based on the received channel parameter, the received channel parameter being an Automatic Gain Control (AGC) level crossing rate or variance.
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36. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics, the processor receiving a channel parameter and changing a trial scan parameter based on the received channel parameter, the received channel parameter being based on pilot channel received parameters including at least one of the following;
level crossing rate of an envelope of a correlated pilot signal, variance of the envelope of the correlated pilot signal, statistical function of the envelope of the correlated pilot signal, slew rate of the code phase of the pilot signal, phase of the pilot signal, variance of the pilot signal, or rate of change of the pilot signal.
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37. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of a predetermined portion of an information carrying signal; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics, the processor receiving a channel parameter and changing a trial scan parameter based on the received channel parameter, the processor is configured to (i) determine when direction selection is non-beneficial and (ii) cause the adaptive antenna to enter into an omni-directional mode.
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39. A method for making measurements to use in the adaptation of a directional antenna, the method comprising:
causing a scan angle of the antenna to change temporarily from the current angle to at least one trial scan angle during reception of a Power Control Bit (PCB) with a dwell time that is a fraction of a power control group period;
determining a trial metric associated with each trial scan angle; and
selecting a next scan angle based on the trial metrics.
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40. An apparatus for making measurements to use in the adaptation of a directional antenna, the apparatus comprising:
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a scan controller to cause a scan angle of the antenna to change temporarily from the current angle to at least one trial scan angle during reception of a Power Control Bit (PCB) with a dwell time that is a fraction of a power control group period; a processor coupled to the scan controller to determine a trial metric associated with each trial scan angle; and a selection unit coupled to the processor to select a next scan angle based on the trial metrics.
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Specification