{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9681322","patent":{"patent_number":"US-9681322","title":"Wireless communication system, communication apparatus, wireless communication method and terminal apparatus","assignee":null,"inventors":[],"filing_date":"2012-03-30T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04W","H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":13,"abstract":"A base station is provided with a reference signal for channel state measurement generation part that generates a reference signal for channel state measurement for a mobile terminal to measure a channel state, and transmission antenna parts, that transmit reference signal for channel state measurements to the mobile terminal with each transmission antenna port. The mobile terminal is provided with reception antenna parts, that receive the reference signal for channel state measurements transmitted from the base station in reception antenna ports, and a feedback information generation part which measures a channel state between the transmission antenna port and the reception antenna port based on the received reference signal for channel state measurement to calculate a channel state estimation value, performs grouping on a plurality of channel state estimation values, and generates feedback information for the base station."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Wireless communication system, communication apparatus, wireless communication method and terminal apparatus","description":"A base station is provided with a reference signal for channel state measurement generation part that generates a reference signal for channel state measurement for a mobile terminal to measure a chan","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9681322","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-9681322","citation_suggestion":"Patentable. \"Wireless communication system, communication apparatus, wireless communication method and terminal apparatus\" (US-9681322). https://patentable.app/patents/US-9681322","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9681322","json":"https://patentable.app/api/llm-context/US-9681322","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:39:44.376Z"}