Multipath estimation and multi-line-of-sight detection for localization
AssigneeNokia Technologie Oy
InventorsOana-Elena Barbu, Benny Vejlgaard
Life of this patent
Estimating the term…
Abstract
There are provided apparatuses, methods and computer program products. In accordance with an embodiment, there is disclosed a method including receiving positioning reference signals from a positioning signal transmitter; forming a delay search space from the received positioning reference signals to obtain a plurality of channel taps; estimating a noise precision for the channel taps; estimating channel gains for the channel taps; and estimating a probability of line of sight signal for the channel taps.
Claims14
An apparatus comprising:
- at least one processor;
- and
- at least one non-transitory memory storing instructions that, when executed with the at least one processor, cause the apparatus to perform:
- receiving positioning reference signals from a positioning signal transmitter from a single base station;
- forming a delay search space from the received positioning reference signals to obtain a plurality of channel taps representing an estimation model of a channel between the apparatus and the single base station;
- estimating a noise precision for the plurality of channel taps of a noise process corrupting the received positioning reference signals from the single base station;
- estimating channel gains for individual ones of the plurality of channel taps;
- estimating a probability of a line of sight signal for each of the plurality of channel taps;
- using the estimated probability of the line of sight signal for each channel tap to determine the line of sight signal for each channel tap;
- and
- using the line of sight signal for each of the plurality of channel taps at least in a positioning procedure performed by the apparatus.
A method comprising:
- Receiving, at a user equipment, positioning reference signals from a positioning signal transmitter from a single base station;
- forming a delay search space from the received positioning reference signals to obtain a plurality of channel taps representing an estimation model of a channel between the user equipment and the single base station;
- estimating a noise precision for the plurality of channel taps of a noise process corrupting the received positioning reference signals from the single base station;
- estimating channel gains for the plurality of channel taps;
- estimating a probability of a line of sight signal for each of the plurality of channel taps;
- using the estimated plurality of the line of sight signal for each channel tap to determine the line of sight signal for each channel tap;
- and
- using the line of sight signal for each channel tap at least in a positioning procedure performed by the user equipment.
A non-transitory computer readable medium comprising program instructions stored thereon for performing at least the following:
- receiving, at a user equipment, positioning reference signals from a positioning signal transmitter from a single base station;
- forming a delay search space from the received positioning reference signals to obtain a plurality of channel taps representing an estimation model of a channel between the user equipment and the single base station;
- estimating a noise precision for the plurality of channel taps of a noise process corrupting the received positioning reference signals;
- estimating channel gains for the plurality of channel taps;
- estimating a probability of a line of sight signal for each of the plurality of channel taps;
- estimating a probability of a line of sight signal for each channel tap;
- using the estimated probability of the line of sight signal for each channel tap to determine line of sight signal for each channel tap;
- and
- using the line of sight signal for each channel tap at least in a positioning procedure performed by the user equipment.
Dependencies are inferred from the claim text.