{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9621298","patent":{"patent_number":"US-9621298","title":"Method of optical data transmission using polarization division multiplexing and QPSK","assignee":null,"inventors":[],"filing_date":"2014-06-06T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["H04J","H04B","H04B","H04L","H04L","H04L","H04L"],"num_claims":10,"abstract":"Proposed is a method of optical data transmission. The method comprises different steps. At least one stream of data bits is received. Sets of data bits are mapped onto successive logical states. The logical states correspond to respective sets of two initial QPSK symbols chosen according to a QPSK mapping and according to a set partitioning rule. The logical states are differentially encoded according to a differential encoding rule. For the differentially encoded logical states respective sets of two resulting QPSK symbols are derived according to the QPSK mapping and according to the set partitioning rule. The encoded sets of two QPSK symbols are transmitted using polarization division multiplexing. The differential encoding rule results in a differential encoding of one of the initial QPSK symbols but not the other of the initial QPSK symbols."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of optical data transmission using polarization division multiplexing and QPSK","description":"Proposed is a method of optical data transmission. The method comprises different steps. At least one stream of data bits is received. Sets of data bits are mapped onto successive logical states. The ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9621298","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-9621298","citation_suggestion":"Patentable. \"Method of optical data transmission using polarization division multiplexing and QPSK\" (US-9621298). https://patentable.app/patents/US-9621298","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9621298","json":"https://patentable.app/api/llm-context/US-9621298","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:50:26.150Z"}