{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10491346","patent":{"patent_number":"US-10491346","title":"Multi-antenna system and precoding method thereof","assignee":null,"inventors":[],"filing_date":"2017-12-28T00:00:00.000Z","publication_date":"2019-11-26T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04L","H04L","H04L","H04W","H04W","H04W"],"num_claims":20,"abstract":"A precoding method in a multi-antenna system includes the following steps. A reference device transmits a first reference signal to base station antennas. A base station calculates uplink channel information and transmits it to a coordination server. The base station transmits a second reference signal to the reference device. The reference device calculates downlink channel information and transmits it to the coordination server. The coordination server performs the following steps: calculate carrier frequency offsets (CFO) between base stations according to the uplink channel information; calculate channel calibration coefficients according to the CFO, the uplink channel information, and the downlink channel information; calculate a first downlink channel at a first time point according to a user equipment's first uplink channel and the channel calibration coefficients; use a prediction function to predict a second downlink channel at a second time point; generate a precoder according to the second downlink channel."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Multi-antenna system and precoding method thereof","description":"A precoding method in a multi-antenna system includes the following steps. A reference device transmits a first reference signal to base station antennas. A base station calculates uplink channel info","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10491346","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-10491346","citation_suggestion":"Patentable. \"Multi-antenna system and precoding method thereof\" (US-10491346). https://patentable.app/patents/US-10491346","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10491346","json":"https://patentable.app/api/llm-context/US-10491346","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T03:13:48.155Z"}