Adaptive filters and related control methods

By decomposing the filtering formula into three parts and combining the calculation circuits in the update unit and the filtering unit, the problem of excessive multipliers in digital filters is solved, thereby reducing costs and maintaining filtering quality.

CN122371935APending Publication Date: 2026-07-10FARADAY TECH CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FARADAY TECH CORP
Filing Date
2025-02-07
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing digital filters have too many multipliers in their design, resulting in high manufacturing costs and affecting filtering quality.

Method used

An adaptive filter is used, which decomposes the filtering formula into three parts and uses the first, second and third calculation circuits in the update unit and the filtering unit to generate the filtered signal, reducing the number of multipliers. The filtered signal is then generated by combining the storage component and the adder.

Benefits of technology

While reducing the number of multipliers, the filtering quality is maintained or improved, manufacturing costs are reduced, and the impact of estimation errors is avoided.

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Abstract

This invention discloses an adaptive filter, wherein the filtering unit includes a first calculation circuit, a second calculation circuit, a third calculation circuit, and an adder. The first and second calculation circuits are used to generate a first part and a second part, respectively. The third calculation circuit is used to generate a third part. The third calculation circuit establishes multiple items in a storage component, each item corresponding to two adjacent coefficients of the multiple coefficients, and each item records the product of the two adjacent coefficients. The multiple items are divided into multiple groups of items, and the multiple groups of items are updated sequentially and not simultaneously to generate the third part. The adder is used to sum the first part, the second part, and the third part to generate a filtered signal.
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