{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8537658","patent":{"patent_number":"US-8537658","title":"Method of codebook design and precoder feedback in wireless communication systems","assignee":null,"inventors":[],"filing_date":"2011-07-21T00:00:00.000Z","publication_date":"2013-09-17T00:00:00.000Z","cpc_codes":["H04B","H04B"],"num_claims":20,"abstract":"A method for two component feedback in wireless communication systems wherein a wireless communication device sends a first representation of a first matrix chosen from a first codebook, the first matrix is a N-by-N diagonal matrix with the k-th diagonal elements being σ1*exp(jπ(k−1)m/N), for k from 1 to N/2 and being σ2*exp(jπ(k−N/2−1)m/N) for k from N/2+1 to N, N is a number of antennas, m is an integer between 0 and N−1, and σ1, σ2 are complex valued scalars. The device also sends a second representation of a second N-by-R matrix chosen from a second codebook, with R being a number of spatial layers wherein the first and second representations together convey a precoder matrix as the matrix product of the first and second matrices."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of codebook design and precoder feedback in wireless communication systems","description":"A method for two component feedback in wireless communication systems wherein a wireless communication device sends a first representation of a first matrix chosen from a first codebook, the first mat","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8537658","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-8537658","citation_suggestion":"Patentable. \"Method of codebook design and precoder feedback in wireless communication systems\" (US-8537658). https://patentable.app/patents/US-8537658","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8537658","json":"https://patentable.app/api/llm-context/US-8537658","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:42:15.802Z"}