{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9847817","patent":{"patent_number":"US-9847817","title":"Method, user equipment and base station for determining precoding matrix indicator","assignee":null,"inventors":[],"filing_date":"2015-11-03T00:00:00.000Z","publication_date":"2017-12-19T00:00:00.000Z","cpc_codes":["H04B","H04B","H04L","H04W","H04W"],"num_claims":20,"abstract":"The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a PMI to the base station, the PMI corresponding to the selected precoding matrix. According to the method, the user equipment and the base station for determining PMI, because the non-constant modulus precoding matrix included in the adopted codebook can adjust the shape of a beam, antennas may focus power on a hotspot region, and thus a load balance may be effectively realized."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method, user equipment and base station for determining precoding matrix indicator","description":"The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the referen","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9847817","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-9847817","citation_suggestion":"Patentable. \"Method, user equipment and base station for determining precoding matrix indicator\" (US-9847817). https://patentable.app/patents/US-9847817","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9847817","json":"https://patentable.app/api/llm-context/US-9847817","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:10:49.160Z"}