{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9590706","patent":{"patent_number":"US-9590706","title":"Method and apparatus for equal energy codebooks for antenna arrays with mutual coupling","assignee":null,"inventors":[],"filing_date":"2016-05-18T00:00:00.000Z","publication_date":"2017-03-07T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B"],"num_claims":17,"abstract":"A method and apparatus provide equal energy codebooks for antenna arrays with mutual coupling. A plurality of precoders can be received from a codebook in a transmitter having an antenna array. Each precoder of the plurality of precoders can be transformed using a transformation that maps each precoder to equal radiated power to generate transformed precoders. A transformation matrix for the transformation can be a matrix with column vectors equal to the eigenvectors of a Hermitian and non-negative definite matrix multiplied by a diagonal matrix with the value of each diagonal element equal to the inverse of the positive square root of the eigenvalue of the corresponding eigenvector. A signal can be received for transmission. A transformed precoder of the plurality of transformed precoders can be applied to the signal to generate a precoded signal for transmission over a physical channel. The precoded signal can be transmitted."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for equal energy codebooks for antenna arrays with mutual coupling","description":"A method and apparatus provide equal energy codebooks for antenna arrays with mutual coupling. A plurality of precoders can be received from a codebook in a transmitter having an antenna array. Each p","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9590706","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-9590706","citation_suggestion":"Patentable. \"Method and apparatus for equal energy codebooks for antenna arrays with mutual coupling\" (US-9590706). https://patentable.app/patents/US-9590706","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9590706","json":"https://patentable.app/api/llm-context/US-9590706","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:26:14.407Z"}