Active control method for filtered reference affine projection sign algorithm based on variable step size

US11657796B2 · kind B2 · utility

Assignee

• Harbin Engineering University · CN

Inventors

• Guoyong Jin · Jingwei, CN
• Shanjun Li · Katy, US
• Tiangui Ye · Jingwei, CN

Key dates

• Filing date: Dec 29, 2021
• Grant date: May 23, 2023
• Expiry date: Jan 13, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G10K2210/3054
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

An active control method for filtered reference affine projection sign algorithm based on variable step size includes: S1, acquiring impulse noise signals and transmitting the signals to control filters; S2, transmitting the impulse noise signals by the control filters to post filters; S3, generating cancellation signals of the impulse noise signals by the post filters according to the impulse noise signals and internal active control algorithms, and transmitting the cancellation signals to a speaker; S4, sending out the cancellation signal by the speaker to superimpose with the impulse noise signals to cancel the impulse noise signal. A convex combination structure and a variable step size strategy are adopted, and by adjusting step size coefficients in the control filter structure, convergence speed of algorithm is controlled, contradiction between convergence speed and steady-state error is coordinated, convergence performance of control algorithm to impulse noises is improved, and impulse noises are effectively controlled.