{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8514973","patent":{"patent_number":"US-8514973","title":"Pre-equalisation for UMTS base station","assignee":null,"inventors":[],"filing_date":"2010-06-03T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["H04L","H04L"],"num_claims":18,"abstract":"An arrangement (100) and method for RF filtering in a Node B of a UMTS TDD system by providing: a DAC converter (130) converting digital signals to analog signals; providing a narrow band analogue channel filter (150) filtering the analog signals; and providing a digital pre-equalizer FIR filter (120) coupled before the DAC (120) to filter the digital signals, the digital pre-equalizer filter means substantially correcting for non linear phase response (122) non-ideality and amplitude response non-ideality (124) in the analogue channel filter (150). This provides the following advantage(s): it enables 3GPP Node B co-location specifications to be met while providing both good transmit accuracy and acceptable ISI performance; and it allows filter center frequency to be field tuned in software, permitting a basic RF single-channel filter to used with its center frequency being field adjustable to a desired value centered on a UMTS channel."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Pre-equalisation for UMTS base station","description":"An arrangement (100) and method for RF filtering in a Node B of a UMTS TDD system by providing: a DAC converter (130) converting digital signals to analog signals; providing a narrow band analogue cha","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8514973","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-8514973","citation_suggestion":"Patentable. \"Pre-equalisation for UMTS base station\" (US-8514973). https://patentable.app/patents/US-8514973","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8514973","json":"https://patentable.app/api/llm-context/US-8514973","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T13:18:22.233Z"}