{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9749161","patent":{"patent_number":"US-9749161","title":"Fixed-point conjugate gradient digital pre-distortion (DPD) adaptation","assignee":null,"inventors":[],"filing_date":"2016-02-23T00:00:00.000Z","publication_date":"2017-08-29T00:00:00.000Z","cpc_codes":["H04L","H04B","H04L","H04B","H04L"],"num_claims":18,"abstract":"A predistortion method and apparatus are provided which use a DPD actuator (225) to apply a memory polynomial formed with first DPD coefficients to a first input signal x[n], thereby generating a first pre-distorted input signal y[n] which is provided to the non-linear electronic device (253) to produce the output signal, where the memory polynomial may be adaptively modified with a digital predistortion adapter (224) which computes second DPD coefficients u[n] with an iterative fixed-point conjugate gradient method which uses N received digital samples of the first pre-distorted input signal y[n] and a feedback signal z[n] captured from the output signal to process a set of conjugate gradient parameters (u, b, v, r, ω, α, β) at each predetermined interval, thereby updating the first DPD coefficients with the second DPD coefficients u[n] generate a second pre-distorted input signal which is provided to the non-linear electronic device."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Fixed-point conjugate gradient digital pre-distortion (DPD) adaptation","description":"A predistortion method and apparatus are provided which use a DPD actuator (225) to apply a memory polynomial formed with first DPD coefficients to a first input signal x[n], thereby generating a firs","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9749161","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-9749161","citation_suggestion":"Patentable. \"Fixed-point conjugate gradient digital pre-distortion (DPD) adaptation\" (US-9749161). https://patentable.app/patents/US-9749161","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9749161","json":"https://patentable.app/api/llm-context/US-9749161","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:37:49.883Z"}