{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8503567","patent":{"patent_number":"US-8503567","title":"Multiple-input multiple-output (MIMO) transmission with rank-dependent precoding","assignee":null,"inventors":[],"filing_date":"2011-07-25T00:00:00.000Z","publication_date":"2013-08-06T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L"],"num_claims":24,"abstract":"Techniques for performing rank-dependent precoding for a Mulitple-Input Multiple-Output (MIMO) transmission are described. Each rank may be associated with a set of at least one precoding vector or matrix that can provide good performance for that rank. A transmitter may obtain a precoding vector for a rank-1 transmission from a first set containing at least one column vector of a unitary matrix, e.g., a Fourier matrix. The transmitter may perform precoding for the rank-1 transmission based on the precoding vector. The transmitter may obtain a precoding matrix for a rank-2 transmission from a second set containing an identity matrix. The transmitter may perform precoding for the rank-2 transmission based on the precoding matrix. For the rank-2 transmission, the transmitter may select the identity matrix as the precoding matrix if a MIMO channel resembles a diagonal channel (which may be determined based on antenna configurations) and may select the unitary matrix otherwise."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Multiple-input multiple-output (MIMO) transmission with rank-dependent precoding","description":"Techniques for performing rank-dependent precoding for a Mulitple-Input Multiple-Output (MIMO) transmission are described. Each rank may be associated with a set of at least one precoding vector or ma","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8503567","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-8503567","citation_suggestion":"Patentable. \"Multiple-input multiple-output (MIMO) transmission with rank-dependent precoding\" (US-8503567). https://patentable.app/patents/US-8503567","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8503567","json":"https://patentable.app/api/llm-context/US-8503567","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T20:34:12.182Z"}