Method and apparatus for on-device positioning using compressed fingerprint archives
Номер патента: EP2507644A1
Опубликовано: 10-10-2012
Автор(ы): Jonathan Ledlie
Принадлежит: Nokia Oyj
Опубликовано: 10-10-2012
Автор(ы): Jonathan Ledlie
Принадлежит: Nokia Oyj
Реферат: A method and apparatus are provided for on-device positioning using compressed fingerprint archives. The method and apparatus may be configured to provide compression of localization fingerprints, to facilitate efficient on-device positioning based on the RF fingerprint model, and to estimate the physical distance between two or more devices. Embodiments of the method may receive a space-to-access point histogram that corresponds to an access point as observed in a space. The histogram may be normalized and a mean and standard deviation may be calculated from the histogram. A weight may be assigned to the access point corresponding to the frequency with which the access point is observed within the space. A mean, standard deviation, and weight may be calculated and assigned for each of a plurality of access points as observed within a space. The mean, standard deviation, and weight of each access point may be combined to form a data triple. The data triples may be combined to form a finger print of access points observed from that space. The data triple or plurality of data triples with the lowest assigned weight(s)may be removed from the fingerprint.
Method and apparatus for on-device positioning using compressed fingerprint archives
Номер патента: US9182472B2. Автор: Jonathan Ledlie. Владелец: NOKIA TECHNOLOGIES OY. Дата публикации: 2015-11-10.