{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11476912","patent":{"patent_number":"US-11476912","title":"Single input single output (SISO) physical layer key exchange","assignee":null,"inventors":[],"filing_date":"2021-09-17T00:00:00.000Z","publication_date":"2022-10-18T00:00:00.000Z","cpc_codes":["H04B","H04L","H04B","H04B","H04B","H04L","H04L","H04L","H04L","H04L","H04W","H04L","H04L","H04W","H04W"],"num_claims":20,"abstract":"A processor coupled to a first communication device produces and transmits a first encoded vector and a second encoded vector to a second communication device via a communication channel that applies a channel transformation to the encoded vectors during transmission. A processor coupled to the second communication device receives the transformed signals, constructs a matrix based on the transformed signals, detects an effective channel thereof, and identifies left and right singular vectors of the effective channel. A precoding matrix is selected from a codebook of unitary matrices based on a message, and a second encoded vector is produced based on a second known vector, the precoding matrix, a complex conjugate of the left singular vectors, and the right singular vectors. A first symbol of the second encoded vector and a second symbol of the second encoded vector are sent to the first communication device for identification of the message."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Single input single output (SISO) physical layer key exchange","description":"A processor coupled to a first communication device produces and transmits a first encoded vector and a second encoded vector to a second communication device via a communication channel that applies ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11476912","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-11476912","citation_suggestion":"Patentable. \"Single input single output (SISO) physical layer key exchange\" (US-11476912). https://patentable.app/patents/US-11476912","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11476912","json":"https://patentable.app/api/llm-context/US-11476912","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T08:00:47.788Z"}