{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9680667","patent":{"patent_number":"US-9680667","title":"Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method","assignee":null,"inventors":[],"filing_date":"2016-07-06T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04L","H04L"],"num_claims":12,"abstract":"A circuit includes a calculation circuit configured to calculate a noise power of a predetermined-training-sequence pattern repeatedly included in a first signal input into an adaptive equalizer, based on a second signal obtained by compensating the first signal by a compensation circuit, a channel-estimation value based on the second signal, and the predetermined-training-sequence pattern; and an average circuit configured to obtain an average value of estimation values of frequency offsets based on the predetermined-training-sequence pattern having the noise power equal to or smaller than a predetermined power, among estimation values of frequency offsets based on the predetermined-training-sequence pattern, wherein the compensation circuit is configured to compensate a frequency offset of the predetermined-training sequence pattern based on the average value and thereby obtain the second signal, and the adaptive equalizer is configured to perform adaptive-equalization processing of the first signal with a setting value based on the second signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method","description":"A circuit includes a calculation circuit configured to calculate a noise power of a predetermined-training-sequence pattern repeatedly included in a first signal input into an adaptive equalizer, base","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9680667","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-9680667","citation_suggestion":"Patentable. \"Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method\" (US-9680667). https://patentable.app/patents/US-9680667","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9680667","json":"https://patentable.app/api/llm-context/US-9680667","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:56:04.274Z"}