{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11284338","patent":{"patent_number":"US-11284338","title":"Hidden node discovery for multiple-input-multiple-output (MIMO) in unlicensed frequency bands","assignee":null,"inventors":[],"filing_date":"2018-03-14T00:00:00.000Z","publication_date":"2022-03-22T00:00:00.000Z","cpc_codes":["H04B","H04W","H04B","H04W","H04W","H04W"],"num_claims":20,"abstract":"A base station for a multiple-input, multiple-output (MIMO) array receives a message that includes information identifying the transmitting and receiving nodes. Based on whether the base station has access to up-to-date channel covariance matrices for the nodes, the base station selectively performs a clear channel assessment in an unlicensed frequency band concurrently with placing nulls in directions associated with the nodes. In some cases, the up-to-date channel covariance matrices are used to place nulls in the directions associated with the nodes concurrently with performing the clear channel assessment in response to the up-to-date channel covariance matrices being available to the base station. Placement of nulls in the directions associated with the nodes is bypassed in response to the up-to-date channel covariance matrices not being available to the base station."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Hidden node discovery for multiple-input-multiple-output (MIMO) in unlicensed frequency bands","description":"A base station for a multiple-input, multiple-output (MIMO) array receives a message that includes information identifying the transmitting and receiving nodes. Based on whether the base station has a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11284338","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-11284338","citation_suggestion":"Patentable. \"Hidden node discovery for multiple-input-multiple-output (MIMO) in unlicensed frequency bands\" (US-11284338). https://patentable.app/patents/US-11284338","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11284338","json":"https://patentable.app/api/llm-context/US-11284338","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T12:19:14.316Z"}