{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8538278","patent":{"patent_number":"US-8538278","title":"Superimposed training and digital filtering coherent optical receivers","assignee":null,"inventors":[],"filing_date":"2010-02-09T00:00:00.000Z","publication_date":"2013-09-17T00:00:00.000Z","cpc_codes":["H04J","H04B","H04B","H04B"],"num_claims":13,"abstract":"In a polarization-multiplexing optical communications system, a method and system for coherent reception of polarization-multiplexed optical communications. Training and data sequences are recovered from a plurality of orthogonally polarized signals, such that training and data sequences may be used on a single channel without loss of spectral efficiency. This is accomplished by estimating a channel response for each orthogonally polarized signal based on the mean of the signal and distinguishing between a data sequence and a training sequence in each orthogonally polarized signal. Such distinguishing is accomplished according to an iterative linear minimum mean-square equalization based on the respective channel response estimate."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Superimposed training and digital filtering coherent optical receivers","description":"In a polarization-multiplexing optical communications system, a method and system for coherent reception of polarization-multiplexed optical communications. Training and data sequences are recovered f","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8538278","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-8538278","citation_suggestion":"Patentable. \"Superimposed training and digital filtering coherent optical receivers\" (US-8538278). https://patentable.app/patents/US-8538278","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8538278","json":"https://patentable.app/api/llm-context/US-8538278","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T11:51:50.066Z"}