{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9813107","patent":{"patent_number":"US-9813107","title":"Adaptive echo cancellation for RFID systems","assignee":null,"inventors":[],"filing_date":"2014-05-28T00:00:00.000Z","publication_date":"2017-11-07T00:00:00.000Z","cpc_codes":["H04B","G06K","G06K","H04W","H04B"],"num_claims":20,"abstract":"A radio-frequency identification (RFID) reader having fast-adaptive echo cancellation for backscatter-modulated signals is described. The echo cancellation includes subtracting an RF-level cancel signal from the received signal, where the cancel signal is generated based upon an error measured in the receive signal after down-conversion to baseband and low-pass filtering. The cancel signal is based upon a cumulative sum or integral of error signals and an estimated complex-valued transfer function of the scaling circuit. Methods of quick calibration of the reader are described, including accounting for circuit offsets and determining the estimated complex-valued transfer function."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Adaptive echo cancellation for RFID systems","description":"A radio-frequency identification (RFID) reader having fast-adaptive echo cancellation for backscatter-modulated signals is described. The echo cancellation includes subtracting an RF-level cancel sign","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9813107","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-9813107","citation_suggestion":"Patentable. \"Adaptive echo cancellation for RFID systems\" (US-9813107). https://patentable.app/patents/US-9813107","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9813107","json":"https://patentable.app/api/llm-context/US-9813107","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T14:40:51.536Z"}