{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11277206","patent":{"patent_number":"US-11277206","title":"Modulation formats with fractional spectral efficiency","assignee":null,"inventors":[],"filing_date":"2020-09-11T00:00:00.000Z","publication_date":"2022-03-15T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04L","H04L"],"num_claims":20,"abstract":"A transmitter maps an N-bit sequence to a point selected from a four-dimensional (4D) constellation consisting of 2N points which form a subset of a Cartesian product of first and second two-dimensional (2D) constellations, the first constellation consisting of M1 points divided into first, second, and third points, and the second constellation consisting of M2 points divided into fourth, fifth, and sixth points, wherein M1, M2≥5, and wherein log2(M1×M2)>N. The subset includes any 4D point that is generated by combining any one of the M1 points and any one of the fourth points; includes any 4D point that is generated by combining any one of the first points and any one of M2 points; and excludes any 4D point that is generated by combining any third point and any sixth point. An optical signal representing the selected point is transmitted to a receiver."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Modulation formats with fractional spectral efficiency","description":"A transmitter maps an N-bit sequence to a point selected from a four-dimensional (4D) constellation consisting of 2N points which form a subset of a Cartesian product of first and second two-dimension","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11277206","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-11277206","citation_suggestion":"Patentable. \"Modulation formats with fractional spectral efficiency\" (US-11277206). https://patentable.app/patents/US-11277206","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11277206","json":"https://patentable.app/api/llm-context/US-11277206","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T09:14:28.317Z"}