Frequency Transformed Radiomap Data Set
AssigneeHERE Global B.V.
InventorsLauri Wirola, Jari Syrjarinne, Jukka Talvitie, Elena-Simona Lohan
Life of this patent
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Abstract
It is disclosed to obtain a frequency transformed radiomap data set by applying a discrete frequency transform to an original radiomap data set. It is also disclosed to obtain a reconstructed radiomap data set by applying an inverse discrete frequency transform to a frequency transformed radiomap data set.
Claims20
A method for obtaining a frequency transformed radiomap data set, the method comprising:
- obtaining a radio measurement value for at least one discrete coordinate set of a discrete coordinate grid;
- identifying an original radiomap data set based on the radio measurement value for the at least one discrete coordinate set of the discrete coordinate grid;
- applying a discrete frequency transform to the original radiomap data set;
- generating a frequency transformed radiomap data set from the discrete frequency transform;
- and
- storing the frequency transformed radiomap data set for position calculation.
At least one apparatus comprising at least one processor and at least one memory including at least one computer program code, the at least one memory and the at least one computer program code configured to, with the at least one processor, cause at least one an apparatus at least to perform:
- obtaining a radio measurement value for at least one discrete coordinate set of a discrete coordinate grid;
- identifying an original radiomap data set based on the radio measurement value for the at least one discrete coordinate set of the discrete coordinate grid;
- applying a discrete frequency transform to the original radiomap data set;
- generating a frequency transformed radiomap data set from the discrete frequency transform;
- storing the frequency transformed radiomap data set for position calculation.
A non-transitory computer readable storage medium is described, in which computer program code is stored, the program code including instruction to perform a method comprising:
- obtaining a radio measurement value for at least one discrete coordinate set of a discrete coordinate grid;
- identifying an original radiomap data set based on the radio measurement value for the at least one discrete coordinate set of the discrete coordinate grid;
- applying a discrete frequency transform to the original radiomap data set;
- generating a frequency transformed radiomap data set from the discrete frequency transform;
- obtaining a reconstructed radiomap data set from the inverse discrete frequency transform;
- performing a comparison of the reconstructed radio map data set to the original radiomap data set;
- and
- determining, in response to the comparison, an error indicator indicating an error of the reconstructed radiomap data set.
Dependencies are inferred from the claim text.