{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9621299","patent":{"patent_number":"US-9621299","title":"Coherent communication system, communication method, and transmission method","assignee":null,"inventors":[],"filing_date":"2014-01-15T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["H04J","H04B","H04B","H04B","H04B","H04B","H04B","H04B","H04J","H04B"],"num_claims":22,"abstract":"The estimation of an amount of chromatic dispersion using a training signal sequence is possible. A transmission method includes: a training signal sequence generation step of generating, as training signal sequences, a plurality of signal sequences having power concentrated in a plurality of frequency bands, the power concentrated at different frequency bands; a training signal sequence selection step of selecting at least one training signal sequence from among the plurality of training signal sequences generated in the training signal sequence generation step, a signal multiplexing step of generating a signal sequence obtained by time-division multiplexing the training signal sequence selected in the training signal sequence selection step with a transmission data sequence, and an electrical-to-optical conversion step of transmitting the signal sequence generated in the signal multiplexing step as an optical signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Coherent communication system, communication method, and transmission method","description":"The estimation of an amount of chromatic dispersion using a training signal sequence is possible. A transmission method includes: a training signal sequence generation step of generating, as training ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9621299","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-9621299","citation_suggestion":"Patentable. \"Coherent communication system, communication method, and transmission method\" (US-9621299). https://patentable.app/patents/US-9621299","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9621299","json":"https://patentable.app/api/llm-context/US-9621299","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:22:11.477Z"}