{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9780936","patent":{"patent_number":"US-9780936","title":"Method and apparatus for transmitting downlink reference signal in wireless communication system supporting multiple antennas","assignee":null,"inventors":[],"filing_date":"2017-01-23T00:00:00.000Z","publication_date":"2017-10-03T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04J","H04L","H04L","H04L","H04L","H04W","H04W","H04W","H04W"],"num_claims":12,"abstract":"A base station for transmitting channel state information-reference signals (CSI-RSs) for eight or less antenna ports in a wireless communication system, the base station includes a reception module; a transmission module; and a processor for controlling the transmission module to transmit the CSI-RSs in a downlink subframe to the user equipment, and for controlling the reception module to receive channel state information measured based on the CSI-RSs from the user equipment, wherein the CSI-RSs are mapped to one resource element (RE) group among a plurality of RE groups, each RE group includes a plurality of REs, and one RE is defined by one subcarrier in one orthogonal frequency division multiplexing (OFDM) symbol, wherein, in a resource region defined by 14 OFDM symbols and 12 subcarriers in the downlink subframe."},"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 reference signal in wireless communication system supporting multiple antennas","description":"A base station for transmitting channel state information-reference signals (CSI-RSs) for eight or less antenna ports in a wireless communication system, the base station includes a reception module; ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9780936","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-9780936","citation_suggestion":"Patentable. \"Method and apparatus for transmitting downlink reference signal in wireless communication system supporting multiple antennas\" (US-9780936). https://patentable.app/patents/US-9780936","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9780936","json":"https://patentable.app/api/llm-context/US-9780936","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:03:49.482Z"}