{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9712253","patent":{"patent_number":"US-9712253","title":"Timing recovery for optical coherent receivers in the presence of polarization mode dispersion","assignee":null,"inventors":[],"filing_date":"2015-09-29T00:00:00.000Z","publication_date":"2017-07-18T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04L","H04L"],"num_claims":27,"abstract":"A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Timing recovery for optical coherent receivers in the presence of polarization mode dispersion","description":"A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. Th","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9712253","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-9712253","citation_suggestion":"Patentable. \"Timing recovery for optical coherent receivers in the presence of polarization mode dispersion\" (US-9712253). https://patentable.app/patents/US-9712253","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9712253","json":"https://patentable.app/api/llm-context/US-9712253","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:58:33.019Z"}