{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9813134","patent":{"patent_number":"US-9813134","title":"Base station and antenna calibration method","assignee":null,"inventors":[],"filing_date":"2017-06-06T00:00:00.000Z","publication_date":"2017-11-07T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04L","H04L","H04W"],"num_claims":8,"abstract":"A first FFT operator converts, with respect to each of analog circuits, a feedback signal x(t) in the time domain that is obtained after a transmission signal d(t) passes through the analog circuit into a feedback signal X(f) in the frequency domain. A second FFT operator converts the transmission signal in the time domain into a transmission signal D(f) in the frequency domain. A phase error calculator calculates, with respect to each of the analog circuits, a phase error C(f) in the frequency domain based on the feedback signal X(f) and the transmission signal D(f). An IFFT operator calculates, with respect to each of the analog circuits, a tap coefficient c(t) of an FIR filter based on the phase error C(f). The FIR filter 21 filters, with respect to each of the analog circuits, the transmission signal d(t) based on the tap coefficient c(t)."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Base station and antenna calibration method","description":"A first FFT operator converts, with respect to each of analog circuits, a feedback signal x(t) in the time domain that is obtained after a transmission signal d(t) passes through the analog circuit in","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9813134","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-9813134","citation_suggestion":"Patentable. \"Base station and antenna calibration method\" (US-9813134). https://patentable.app/patents/US-9813134","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9813134","json":"https://patentable.app/api/llm-context/US-9813134","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T18:30:21.398Z"}