{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8494006","patent":{"patent_number":"US-8494006","title":"Method and apparatus for transmitting downlink reference signal in wireless communication system supporting multiple antennas","assignee":null,"inventors":[],"filing_date":"2011-01-14T00:00:00.000Z","publication_date":"2013-07-23T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04J","H04L","H04L","H04L","H04L","H04W","H04W","H04W","H04W"],"num_claims":8,"abstract":"A method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas is disclosed. A method for transmitting Channel State Information-Reference Signals (CSI-RSs) for eight or less antenna ports includes selecting one of a plurality of CSI-RS Resource Element (RE) groups defined on a data region of a downlink subframe and mapping CSI-RSs for the eight or less antenna ports to the selected CSI-RS RE group, and transmitting the downlink subframe in which the CSI-RSs for the eight or less antenna ports are mapped. The plurality of CSI-RS RE groups is defined such that a transmission diversity RE pair for data transmitted on the downlink subframe is not broken."},"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 method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas is disclosed. A method for transmitting Channel State Information-Re","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8494006","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-8494006","citation_suggestion":"Patentable. \"Method and apparatus for transmitting downlink reference signal in wireless communication system supporting multiple antennas\" (US-8494006). https://patentable.app/patents/US-8494006","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8494006","json":"https://patentable.app/api/llm-context/US-8494006","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T07:59:28.278Z"}