{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8472309","patent":{"patent_number":"US-8472309","title":"Using CDMA to send uplink signals in WLANs","assignee":null,"inventors":[],"filing_date":"2009-01-12T00:00:00.000Z","publication_date":"2013-06-25T00:00:00.000Z","cpc_codes":["H04L","H04B","H04J","H04L","H04J","H04W"],"num_claims":124,"abstract":"Methods and apparatus for using code-division multiple access (CDMA) via orthogonal frequency-division multiplexing (OFDM) to convey information from user terminals to an access point (AP) in a wireless local area network (WLAN), for example, are provided. Employed in an effort to support a large number of user terminals while avoiding collisions, this CDMA-based scheme may offer a number of advantages when compared to conventional techniques for transmitting UL signals from a large number of user terminals. First, efficiency with respect to the number of slots used may be increased. In addition, this scheme may be scalable to a high number of user terminals and may have a soft limit as to the number of users that can be supported. Furthermore, this CDMA-based scheme may offer greater tolerance to frequency offsets and may be utilized for ranging and power control."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Using CDMA to send uplink signals in WLANs","description":"Methods and apparatus for using code-division multiple access (CDMA) via orthogonal frequency-division multiplexing (OFDM) to convey information from user terminals to an access point (AP) in a wirele","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8472309","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-8472309","citation_suggestion":"Patentable. \"Using CDMA to send uplink signals in WLANs\" (US-8472309). https://patentable.app/patents/US-8472309","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8472309","json":"https://patentable.app/api/llm-context/US-8472309","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T08:37:27.451Z"}