{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9608704","patent":{"patent_number":"US-9608704","title":"MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding","assignee":null,"inventors":[],"filing_date":"2014-09-29T00:00:00.000Z","publication_date":"2017-03-28T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04B","H04B","H04B","H04L","H04W","H04L","H04L"],"num_claims":20,"abstract":"In a closed-loop wireless communication system, a codebook-based feedback mechanism is provided to enable non-unitary precoding for multi-stream transmission, where in each stream is optimized with suitable transmission power allocation and AMC. The codebook-based feedback mechanism uses a precoding codebook having a power allocation matrix which is constrained to specify that beamforming always applies full power to a predetermined beam. With this constraint, a one-bit power allocation feedback index may be used to switch between beamforming and spatial multiplexing."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding","description":"In a closed-loop wireless communication system, a codebook-based feedback mechanism is provided to enable non-unitary precoding for multi-stream transmission, where in each stream is optimized with su","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9608704","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-9608704","citation_suggestion":"Patentable. \"MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding\" (US-9608704). https://patentable.app/patents/US-9608704","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9608704","json":"https://patentable.app/api/llm-context/US-9608704","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:05:20.760Z"}