{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9647794","patent":{"patent_number":"US-9647794","title":"Channel state information feedback","assignee":null,"inventors":[],"filing_date":"2011-02-14T00:00:00.000Z","publication_date":"2017-05-09T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L"],"num_claims":14,"abstract":"An apparatus and method for feeding back channel state information are disclosed. The method of providing channel state information for a wireless communications channel provided between a first network node having at least one transmission antenna and a second network node having at least one reception antenna comprises the steps of: estimating a current value of at least a first type of channel state information for at least one sub-channel within the channel from signals received by the at least one reception antenna over the channel from the at least one transmission antenna; determining whether the current value of the first type of channel state information varies from previously-transmitted value for the first type of channel state information by at least a predetermined amount; and if so, transmitting an indicator indicative of the current value for the first type of channel state information to the first network node."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Channel state information feedback","description":"An apparatus and method for feeding back channel state information are disclosed. The method of providing channel state information for a wireless communications channel provided between a first netwo","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9647794","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-9647794","citation_suggestion":"Patentable. \"Channel state information feedback\" (US-9647794). https://patentable.app/patents/US-9647794","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9647794","json":"https://patentable.app/api/llm-context/US-9647794","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T18:30:46.346Z"}