{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9641374","patent":{"patent_number":"US-9641374","title":"Direct-detected orthogonal frequency-division multiplexing with dispersion pre-compensation digital signal processing","assignee":null,"inventors":[],"filing_date":"2015-02-04T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["H04L","H04B","H04L","H04L"],"num_claims":18,"abstract":"Chromatic dispersion is pre-compensated in a direct-detected orthogonal frequency-division multiplexed optical transmitter through digital signal processing methods, to generate signals that can be transmitted over an optical fiber. The dispersion pre-compensation digital signal processing may include multiplying subcarriers by a respective factor. The dispersion pre-compensation digital signal processing may instead include application of a finite impulse response filter to signals. The dispersion pre-compensation digital signal processing may instead include fast Fourier transformations of signals, application of a frequency domain filter to signals generated by the fast Fourier transformations, and inverse fast Fourier transformations of the signals produced by application of the frequency domain filter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Direct-detected orthogonal frequency-division multiplexing with dispersion pre-compensation digital signal processing","description":"Chromatic dispersion is pre-compensated in a direct-detected orthogonal frequency-division multiplexed optical transmitter through digital signal processing methods, to generate signals that can be tr","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9641374","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-9641374","citation_suggestion":"Patentable. \"Direct-detected orthogonal frequency-division multiplexing with dispersion pre-compensation digital signal processing\" (US-9641374). https://patentable.app/patents/US-9641374","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9641374","json":"https://patentable.app/api/llm-context/US-9641374","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:19:32.616Z"}