{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8537908","patent":{"patent_number":"US-8537908","title":"Pilot transmission and channel estimation for an OFDM system with excess delay spread","assignee":null,"inventors":[],"filing_date":"2008-03-03T00:00:00.000Z","publication_date":"2013-09-17T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":40,"abstract":"Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands is greater than the cyclic prefix length. This “oversampling” may be achieved by using more pilot subbands in each symbol period or different sets of pilot subbands in different symbol periods. In one example, a first set of pilot subbands may be received in a first symbol period, and a second set of pilot subbands may be received in a second symbol period. The first set of pilot subbands and the second set of pilot subbands may be staggered in frequency."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Pilot transmission and channel estimation for an OFDM system with excess delay spread","description":"Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8537908","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-8537908","citation_suggestion":"Patentable. \"Pilot transmission and channel estimation for an OFDM system with excess delay spread\" (US-8537908). https://patentable.app/patents/US-8537908","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8537908","json":"https://patentable.app/api/llm-context/US-8537908","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T11:13:01.901Z"}