{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9680541","patent":{"patent_number":"US-9680541","title":"Methods and apparatuses for channel estimation and feedback in a three-dimensional multiple input and multiple output system","assignee":null,"inventors":[],"filing_date":"2013-08-13T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04L","H04L","H04L"],"num_claims":17,"abstract":"Embodiments of the present disclosure relate to methods and apparatuses for channel estimation and feedback in a three dimensional multiple input multiple output (3D-MIMO) system. A method may comprise: transmitting a plurality of reference signals for a plurality of columns in an antenna array; receiving indication information on configuration adjustment of a precoding information feedback, wherein the indication information is based on measurement on the plurality of reference signals; and adjusting a configuration of the precoding information feedback based on the indication information so that a multiple vertical precoding information feedback is enabled when it can obtain a performance gain. Especially, the multiple vertical precoding information feedback may represent feeding back a plurality of vertical precoding matrix indicators for the plurality of columns in the antenna array. In embodiments of the present disclosure, there is provided a new solution for channel estimation and feedback in a 3D-MIMO system, and it may achieve a more accurate beamforming and/or a higher order spatial multiplexing, thereby improving the performance of the 3D-MIMO system."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and apparatuses for channel estimation and feedback in a three-dimensional multiple input and multiple output system","description":"Embodiments of the present disclosure relate to methods and apparatuses for channel estimation and feedback in a three dimensional multiple input multiple output (3D-MIMO) system. A method may compris","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9680541","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-9680541","citation_suggestion":"Patentable. \"Methods and apparatuses for channel estimation and feedback in a three-dimensional multiple input and multiple output system\" (US-9680541). https://patentable.app/patents/US-9680541","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9680541","json":"https://patentable.app/api/llm-context/US-9680541","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:34:32.627Z"}