{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8477642","patent":{"patent_number":"US-8477642","title":"Ranging and distance based spectrum selection in cognitive radio","assignee":null,"inventors":[],"filing_date":"2010-04-21T00:00:00.000Z","publication_date":"2013-07-02T00:00:00.000Z","cpc_codes":["H04W","H04W","H04W"],"num_claims":20,"abstract":"A method and apparatus for performing spectral allocation for a wireless link in a wireless communication system is disclosed. The method determines a distance/range for the wireless link and assigns an optimal sub-carrier frequency to the wireless link based on (1) a higher frequency to lower frequency priority and (2) on the value of the distance/range of the wireless link and (3) on the presence or absence of a primary user in a spectrum of the wireless link. Higher frequency sub-carriers are assigned to wireless links that have a shorter distance/range and lower frequency sub-carriers are assigned to wireless links that have a longer distance/range. The method of the present work increases the spectral efficiency of the wireless communication system and improves system bandwidth."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Ranging and distance based spectrum selection in cognitive radio","description":"A method and apparatus for performing spectral allocation for a wireless link in a wireless communication system is disclosed. The method determines a distance/range for the wireless link and assigns ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8477642","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-8477642","citation_suggestion":"Patentable. \"Ranging and distance based spectrum selection in cognitive radio\" (US-8477642). https://patentable.app/patents/US-8477642","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8477642","json":"https://patentable.app/api/llm-context/US-8477642","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T09:17:17.946Z"}