{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8503379","patent":{"patent_number":"US-8503379","title":"Apparatus and method for precoding by midamble in multiple input multiple output wireless communication system","assignee":null,"inventors":[],"filing_date":"2009-04-15T00:00:00.000Z","publication_date":"2013-08-06T00:00:00.000Z","cpc_codes":["H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04B","H04B","H04L","H04L","H04L","H04L"],"num_claims":12,"abstract":"A method and apparatus for performing codebook-based precoding in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. In a method for operating a Base Station (BS) in a MIMO wireless communication system, a reference signal including pilot signals, which are divided by a predefined number of bands and are multiplied by respective codes in a codebook, is transmitted. One or more Mobile Stations (MSs) destined for spatial multiple access are selected using an index of a band and CQI of the band corresponding to the index, which are fed back from one or more MSs. A precoding matrix is generated to process data streams of the selected one or more MSs."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus and method for precoding by midamble in multiple input multiple output wireless communication system","description":"A method and apparatus for performing codebook-based precoding in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. In a method for operating a Base Station (BS) in a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8503379","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-8503379","citation_suggestion":"Patentable. \"Apparatus and method for precoding by midamble in multiple input multiple output wireless communication system\" (US-8503379). https://patentable.app/patents/US-8503379","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8503379","json":"https://patentable.app/api/llm-context/US-8503379","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:56:10.236Z"}