{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9794044","patent":{"patent_number":"US-9794044","title":"Short training field for WiFi","assignee":null,"inventors":[],"filing_date":"2015-09-23T00:00:00.000Z","publication_date":"2017-10-17T00:00:00.000Z","cpc_codes":["H04L","H04B","H04L","H04L","H04L","H04L","H04L","H04W","H04W"],"num_claims":25,"abstract":"A method for generating an orthogonal frequency division multiplex (OFDM) data unit conforming to a first communication protocol for transmission via a communication channel is described. A first field is generated that conforms to a second communication protocol and has an integer number of OFDM symbols LN having a periodicity LP. A second field is generated that conforms to the first communication protocol, has an integer number of OFDM symbols HN having a periodicity HP, and is based on a frequency sequence having non-zero values at an integer interval K. The first and second fields are modulated using a tone spacing LTS and a tone spacing HTS, respectively. LTS is a multiple M of HTS. The OFDM data unit is generated to include a preamble including the first and second fields. The second field is generated such that HP is proportional to LP and K and inversely proportional to M."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Short training field for WiFi","description":"A method for generating an orthogonal frequency division multiplex (OFDM) data unit conforming to a first communication protocol for transmission via a communication channel is described. A first fiel","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9794044","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-9794044","citation_suggestion":"Patentable. \"Short training field for WiFi\" (US-9794044). https://patentable.app/patents/US-9794044","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9794044","json":"https://patentable.app/api/llm-context/US-9794044","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:00:05.122Z"}