{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8462643","patent":{"patent_number":"US-8462643","title":"MIMO WLAN system","assignee":null,"inventors":[],"filing_date":"2008-07-15T00:00:00.000Z","publication_date":"2013-06-11T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04B","H04B","H04B","H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04W","H04B","H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04W","H04W","H04W","H04W","H04W"],"num_claims":23,"abstract":"A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"MIMO WLAN system","description":"A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmiss","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8462643","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-8462643","citation_suggestion":"Patentable. \"MIMO WLAN system\" (US-8462643). https://patentable.app/patents/US-8462643","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8462643","json":"https://patentable.app/api/llm-context/US-8462643","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T11:17:38.623Z"}