{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9680551","patent":{"patent_number":"US-9680551","title":"Method of determining two-stage codebook set applicable to 4TX cross-polarized antenna configuration","assignee":null,"inventors":[],"filing_date":"2014-01-13T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04B","H04B"],"num_claims":15,"abstract":"The invention provides a solution of designing a two-stage codebook set applicable to 4Tx cross-polarized antenna configuration and a method of determining a codebook in a multi-input multi-output communication system based upon the designed two-stage codebook set applicable to 4Tx cross-polarized antenna configuration. The first stage codebook relates long-term/wideband channel information and is based on DFT vectors, whereas the second stage codebook relates to short-term/narrowband channel information and is base on selecting columns of the first stage codebook and providing inter-polarization phase information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of determining two-stage codebook set applicable to 4TX cross-polarized antenna configuration","description":"The invention provides a solution of designing a two-stage codebook set applicable to 4Tx cross-polarized antenna configuration and a method of determining a codebook in a multi-input multi-output com","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9680551","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-9680551","citation_suggestion":"Patentable. \"Method of determining two-stage codebook set applicable to 4TX cross-polarized antenna configuration\" (US-9680551). https://patentable.app/patents/US-9680551","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9680551","json":"https://patentable.app/api/llm-context/US-9680551","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:22:07.423Z"}