Method and arrangement for improving the accuracy of positioning-related time measurements in radio system
First Claim
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1. A method, comprising:
- generating a test signal;
directing the test signal to pass through pre-selected radio frequency parts of a receiver used by the radio system in positioning;
directing the test signal to travel along two routes, of which the first route goes through the pre-selected radio frequency parts, and the second route past them, and determining the propagation delay by means of a phase difference between the signals that traveled along the first and second routes;
determining a propagation delay of the test signal through the pre-selected radio frequency parts; and
using the determined propagation delay in improving the accuracy of the time measurements related to positioning,wherein the method is used for improving the accuracy of time measurements related to positioning in a radio system.
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Abstract
The invention relates to a method and arrangement for improving the accuracy of time measurements related to positioning in a radio system. In the method, a test signal is generated; the test signal is directed to travel through pre-selected radio frequency parts of a receiver used in positioning in the radio system; the propagation delay of the test signal through the pre-selected radio frequency parts is determined; and the determined propagation delay is used to improve the accuracy of time measurement related to positioning.
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Citations
34 Claims
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1. A method, comprising:
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generating a test signal; directing the test signal to pass through pre-selected radio frequency parts of a receiver used by the radio system in positioning; directing the test signal to travel along two routes, of which the first route goes through the pre-selected radio frequency parts, and the second route past them, and determining the propagation delay by means of a phase difference between the signals that traveled along the first and second routes; determining a propagation delay of the test signal through the pre-selected radio frequency parts; and using the determined propagation delay in improving the accuracy of the time measurements related to positioning, wherein the method is used for improving the accuracy of time measurements related to positioning in a radio system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An arrangement, comprising:
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a receiver to be used in positioning; a generating unit configured to generate a test signal; a directing unit configured to direct the test signal to pass through pre-selected radio frequency parts of the receiver used in positioning; a unit configured to direct the test signal to travel along two routes, of which the first route goes through the pre-selected radio frequency parts, and the second route past them, and to determine the propagation delay by means of a phase difference between the signals that traveled along the first and second routes; a determining unit configured to determine the propagation delay of the test signal through the pre-selected radio frequency parts; and a unit configured to use the determined propagation delay in improving the accuracy of the time measurements related to positioning, wherein the arrangement is configured to improve the accuracy of time measurements related to positioning in a radio system, comprising at least one user equipment to be positioned, and at least three base transceiver stations having known locations and used in positioning, of which base transceiver stations one acts as a serving base transceiver station to the user equipment. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An apparatus, comprising:
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a receiver to be used in positioning; means for generating a test signal; means for directing the test signal to pass through pre-selected radio frequency parts of the receiver used in positioning; means for directing the test signal to travel along two routes, of which the first route goes through the pre-selected radio frequency parts, and the second route past them, and to determine the propagation delay by means of a phase difference between the signals that traveled alone the first and second routes; means for determining the propagation delay of the test signal through the pre-selected radio frequency parts; and means for using the determined propagation delay in improving the accuracy of the time measurements related to positioning, wherein the arrangement is configured to improve the accuracy of time measurements related to positioning in a radio system, comprising at least one user equipment to be positioned, and at least three base transceiver stations having known locations and used in positioning, of which base transceiver stations one acts as a serving base transceiver station to the user equipment.
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Specification