{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9621238","patent":{"patent_number":"US-9621238","title":"Apparatus and method for sounding wireless channel","assignee":null,"inventors":[],"filing_date":"2016-04-07T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04W","H04W"],"num_claims":17,"abstract":"A method and system for improving the accuracy of phase and frequency offset during multiple in multiple out (MIMO) channel estimation in a sounding procedure. The improved phase and frequency offset process selects resource allocation unit configuration to ensure a minimum pilot density from the available operation modes. A method for reducing the data in the feedback matrix of the sounding procedure correlates the long training frame (LTF) and number of groups (Ng) between the sounding frame and the feedback to improve efficiency in the amount of feedback that is returned."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus and method for sounding wireless channel","description":"A method and system for improving the accuracy of phase and frequency offset during multiple in multiple out (MIMO) channel estimation in a sounding procedure. The improved phase and frequency offset ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9621238","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-9621238","citation_suggestion":"Patentable. \"Apparatus and method for sounding wireless channel\" (US-9621238). https://patentable.app/patents/US-9621238","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9621238","json":"https://patentable.app/api/llm-context/US-9621238","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:36:09.608Z"}