{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9769813","patent":{"patent_number":"US-9769813","title":"Method and apparatus for transmitting downlink signal in wireless communication system","assignee":null,"inventors":[],"filing_date":"2013-09-05T00:00:00.000Z","publication_date":"2017-09-19T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04W","H04W","H04L","H04W"],"num_claims":8,"abstract":"A method of transmitting a downlink signal at a base station in a wireless communication system includes generating a user equipment (UE)-specific reference signal sequence and mapping the generated sequence to resource elements (REs) predetermined according to antenna port groups. The REs for each antenna port group are divided on a frequency axis, on predetermined orthogonal frequency division multiplexing (OFDM) symbols of each slot, and the number of antenna port groups if the number of layers for transmitting the downlink signal is greater than 8 is twice the number of antenna port groups if the number of layers for transmitting the downlink data is equal to or less than 8."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for transmitting downlink signal in wireless communication system","description":"A method of transmitting a downlink signal at a base station in a wireless communication system includes generating a user equipment (UE)-specific reference signal sequence and mapping the generated s","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9769813","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-9769813","citation_suggestion":"Patentable. \"Method and apparatus for transmitting downlink signal in wireless communication system\" (US-9769813). https://patentable.app/patents/US-9769813","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9769813","json":"https://patentable.app/api/llm-context/US-9769813","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:47:44.594Z"}