{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9851445","patent":{"patent_number":"US-9851445","title":"Real-time locating system using GPS time difference of arrival with digital off-air access units and remote units","assignee":null,"inventors":[],"filing_date":"2014-04-21T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["G01S","G01S"],"num_claims":19,"abstract":"A real-time locating system (RTLS) for localization using satellite navigation signals in a Distributed Antenna System includes Off-Air Access Units (OAAUs), each being operable to receive an individual satellite navigation signal from a satellite and to route signals optically to a digital access unit (DAU). Remote digital remote units (DRUs) are located at Remote locations and are operable to receive signals the DAUs. Each individual satellite navigation signal can be appropriately delayed (in a manner that accounts for a DRU's location). For each antenna, a separation distance between a mobile station and a DRU can be estimated based on a signal receipt time at the station. In combination, these distances can be used to estimate the mobile station's precise indoor position."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Real-time locating system using GPS time difference of arrival with digital off-air access units and remote units","description":"A real-time locating system (RTLS) for localization using satellite navigation signals in a Distributed Antenna System includes Off-Air Access Units (OAAUs), each being operable to receive an individu","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9851445","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9851445","citation_suggestion":"Patentable. \"Real-time locating system using GPS time difference of arrival with digital off-air access units and remote units\" (US-9851445). https://patentable.app/patents/US-9851445","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9851445","json":"https://patentable.app/api/llm-context/US-9851445","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:55:50.877Z"}