{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8514909","patent":{"patent_number":"US-8514909","title":"Noise and channel estimation using low spreading factors","assignee":null,"inventors":[],"filing_date":"2011-03-11T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["H04B","H04B","H04L","H04L"],"num_claims":24,"abstract":"Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader measures symbol energy based on the unoccupied code and a noise estimator generates noise estimations based on the measured symbol energies. The subscriber station uses similar techniques in order to perform channel estimations within a period that is a fraction of a symbol period of a longest-spreading-factor code."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Noise and channel estimation using low spreading factors","description":"Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less th","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8514909","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-8514909","citation_suggestion":"Patentable. \"Noise and channel estimation using low spreading factors\" (US-8514909). https://patentable.app/patents/US-8514909","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8514909","json":"https://patentable.app/api/llm-context/US-8514909","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T17:14:05.402Z"}