{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9681267","patent":{"patent_number":"US-9681267","title":"Positioning techniques for narrowband wireless signals under dense multipath conditions","assignee":null,"inventors":[],"filing_date":"2015-06-24T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04W","G01S","H04W","G01S","G01S","H04L"],"num_claims":23,"abstract":"Techniques and systems for position determination using narrowband signals are disclosed. A disclosed technique includes receiving, at a wireless device, signals that are transmitted at different times, each of the signals having a different carrier frequency and representing a different subchannel of a wireless channel; determining estimated magnitudes of the subchannels based respectively on the signals; determining estimated group delays of the subchannels based respectively on the signals; determining an estimated channel frequency response of the wireless channel based on the estimated magnitudes and the estimated group delays; determining a propagation delay of the signals based on the estimated channel frequency response; and generating position information based on the propagation delay."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Positioning techniques for narrowband wireless signals under dense multipath conditions","description":"Techniques and systems for position determination using narrowband signals are disclosed. A disclosed technique includes receiving, at a wireless device, signals that are transmitted at different time","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9681267","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-9681267","citation_suggestion":"Patentable. \"Positioning techniques for narrowband wireless signals under dense multipath conditions\" (US-9681267). https://patentable.app/patents/US-9681267","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9681267","json":"https://patentable.app/api/llm-context/US-9681267","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:40:07.731Z"}