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US 2025/0274201 A1Published application
Method and arrangement for determining at least one distance between antennas
AssigneeKoherent Oy
InventorsKari LEPPÄNEN, Jussi SALMI, Niko VÄISÄNEN
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Abstract
A method for determining at least one distance between pairs of antennas, the method including performing self-measurements and first two-way transmissions at first time intervals, first one-way transmissions at second time intervals, second two-way transmissions at third time intervals, and second one-way transmissions at fourth time intervals. The method also includes determining phase information based on the performed transmissions and determining distance information regarding the at least one distance.
Claims17
A method for determining at least one distance between pairs of antennas, each antenna relating to a radio unit, the method comprising
- performing self-measurements via at least a portion of the antennas at selected first time intervals, and determining self-measurement phase information for each antenna participating in the self-measurements,
- performing first two-way transmissions between a first plurality of the pairs of antennas at the first time intervals, and determining first two-way phase information for each pair of antennas participating in the first two-way transmissions,
- obtaining information regarding clock rates and Doppler frequencies for the first plurality of pairs of antennas,
- determining antenna branch phase response data for the antennas of the first plurality of pairs of antennas and absolute clock offset data between the radio units associated with the first plurality of pairs of antennas using the self-measurement phase information, the first two-way phase information, and the information regarding clock rates and Doppler frequencies,
- performing first one-way transmissions between a second plurality of pairs of antennas at selected second time intervals, and determining first one-way phase information for each pair of antennas participating in the first one-way transmissions,
- determining distance information between the second plurality of pairs of antennas based on the determined first one-way phase information, antenna branch phase response data, and the absolute clock offset data
- performing second two-way transmissions between a third plurality of the pairs of antennas at selected third time intervals, and determining second two-way phase information for each pair of antennas participating in the second two-way transmissions,
- tracking the clock offset changes between the radio units based on the second two-way phase information and the information regarding clock rates and Doppler frequencies,
- performing second one-way transmissions between the second plurality of pairs of antennas at selected fourth time intervals, and determining second one-way phase information for each pair of antennas participating in the second one-way transmissions, and
- updating the distance information between the second plurality of pairs of antennas based on the determined second one-way phase information, the tracked clock offset changes and the antenna branch phase response data.
7 more elements
An arrangement for determining at least one distance between pairs of antennas, the arrangement comprising at least one processor and at least two radio units, each associated with at least one antenna, wherein the arrangement is configured to:
- perform self-measurements via at least a portion of the antennas at selected first time intervals, and determine self-measurement phase information for each antenna participating in the self-measurements,
- perform first two-way transmissions between a first plurality of the pairs of antennas at the first time intervals, and determine first two-way phase information for each pair of antennas participating in the first two-way transmissions,
- obtain information regarding clock rates and Doppler frequencies for the first plurality of pairs of antennas,
- determine antenna branch phase response data for the antennas of the first plurality of pairs of antennas and absolute clock offset data between the radio units associated with the first plurality of pairs of antennas using the self-measurement phase information, the first two-way phase information, and the information regarding clock rates and Doppler frequencies,
- perform first one-way transmissions between a second plurality of pairs of antennas at selected second time intervals, and determine first one-way phase information for each pair of antennas participating in the first one-way transmissions,
- determine distance information between the second plurality of pairs of antennas based on the determined first one-way phase information, antenna branch phase response data, and the absolute clock offset data
- perform second two-way transmissions between a third plurality of the pairs of antennas at selected third time intervals, and determine second two-way phase information for each pair of antennas participating in the second two-way transmissions,
- track the clock offset changes between the radio units using the second two-way phase information and the information regarding clock rates and Doppler frequencies,
- perform second one-way transmissions between the second plurality of pairs of antennas at selected fourth time intervals, and determine second one-way phase information for each pair of antennas participating in the second one-way transmissions,
- update the distance information between the second plurality of pairs of antennas based on the determined one-way phase information, the tracked clock offset changes, and the antenna branch phase response data.
7 more elements
Dependencies are inferred from the claim text.