{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9602177","patent":{"patent_number":"US-9602177","title":"Method and apparatus for efficient feedback in a wireless communication system supporting multiple antennas","assignee":null,"inventors":[],"filing_date":"2016-03-01T00:00:00.000Z","publication_date":"2017-03-21T00:00:00.000Z","cpc_codes":["H04B","H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04W","H04L","H04L","H04L"],"num_claims":12,"abstract":"A method and apparatus for performing effective feedback in a wireless communication system supporting multiple antennas. A method for transmitting CSI of downlink transmission via uplink in a wireless communication system includes transmitting a joint-coded rank indicator (RI) and a first wideband (WB) precoding matrix indicator (PMI) at a first subframe, and transmitting a wideband channel quality indicator (WB CQI) and a second WB PMI at a second subframe. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. If the RI is Rank-1 or Rank-2, the first PMI indicates one of subsets each having 8 indexes from among 16 indexes of the first PMI of a precoding codebook."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for efficient feedback in a wireless communication system supporting multiple antennas","description":"A method and apparatus for performing effective feedback in a wireless communication system supporting multiple antennas. A method for transmitting CSI of downlink transmission via uplink in a wireles","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9602177","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-9602177","citation_suggestion":"Patentable. \"Method and apparatus for efficient feedback in a wireless communication system supporting multiple antennas\" (US-9602177). https://patentable.app/patents/US-9602177","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9602177","json":"https://patentable.app/api/llm-context/US-9602177","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T17:26:59.306Z"}