{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9826263","patent":{"patent_number":"US-9826263","title":"Detecting CPD in HFC network with OFDM signals","assignee":null,"inventors":[],"filing_date":"2015-10-21T00:00:00.000Z","publication_date":"2017-11-21T00:00:00.000Z","cpc_codes":["H04N","H04L","H04N","H04N","H04B","H04L"],"num_claims":53,"abstract":"A apparatus or method for detecting CPD in an HFC network, comprising: (a) acquiring digital RF downstream signals from a CMTS or CM; (b) emulating even and odd order IM distortion products from the downstream signals; (c) acquiring RF upstream signals from the CMTS during a quiet period; (d) cross-correlating the RF upstream signals with the emulated even and odd order IM products to produce even and odd order cross-correlation functions, respectively; (e) accumulating, separately, a multiplicity of even and odd order cross-correlation functions; (f) calculating even and odd order cross-correlation envelopes from the accumulated even and odd order cross-correlation functions, respectively; and (g) detecting a CPD source from either or both of the even and odd order cross-correlation envelopes by the presence of a peak in either or both of the envelopes."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Detecting CPD in HFC network with OFDM signals","description":"A apparatus or method for detecting CPD in an HFC network, comprising: (a) acquiring digital RF downstream signals from a CMTS or CM; (b) emulating even and odd order IM distortion products from the d","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9826263","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-9826263","citation_suggestion":"Patentable. \"Detecting CPD in HFC network with OFDM signals\" (US-9826263). https://patentable.app/patents/US-9826263","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9826263","json":"https://patentable.app/api/llm-context/US-9826263","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T14:00:21.405Z"}