{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11303377","patent":{"patent_number":"US-11303377","title":"Estimating frequency-offsets and multi-antenna channels in MIMO OFDM systems","assignee":null,"inventors":[],"filing_date":"2020-05-18T00:00:00.000Z","publication_date":"2022-04-12T00:00:00.000Z","cpc_codes":["H04L","H04B","H04B","H04B","H04B","H04J","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":15,"abstract":"Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter applies a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Estimating frequency-offsets and multi-antenna channels in MIMO OFDM systems","description":"Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequen","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11303377","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-11303377","citation_suggestion":"Patentable. \"Estimating frequency-offsets and multi-antenna channels in MIMO OFDM systems\" (US-11303377). https://patentable.app/patents/US-11303377","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11303377","json":"https://patentable.app/api/llm-context/US-11303377","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T10:35:15.882Z"}