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Modular design method of ANC (Active Noise Control) system based on FPGA (Field Programmable Gate Array)

A technology of active noise control and design method, applied in the direction of active noise control, sounding equipment, instruments, etc., can solve problems such as reducing the operating efficiency of the system, and achieve the effects of high operating frequency, improved computing speed, and fast convergence speed.

Pending Publication Date: 2020-02-18
重庆中易智芯科技有限责任公司
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Problems solved by technology

[0005] In the hardware design of active noise control using DSP, the operating efficiency of the system will be reduced due to the need to execute inherent software programs in the early stage

Method used

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  • Modular design method of ANC (Active Noise Control) system based on FPGA (Field Programmable Gate Array)
  • Modular design method of ANC (Active Noise Control) system based on FPGA (Field Programmable Gate Array)
  • Modular design method of ANC (Active Noise Control) system based on FPGA (Field Programmable Gate Array)

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Embodiment Construction

[0038] The technical methods in the embodiments of the present invention will be described clearly and in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0039] The technical method that the present invention solves the problems of the technologies described above is:

[0040] The ANC system proposed by the present invention uses Quartus II for simulation.

[0041] as attached figure 1 As shown, first the reference signal is filtered through the secondary path S(z), and then the filtered signal x'(n) is used to update the weight coefficient of the adaptive filter W(z). Secondary Path Online Update Adaptive Filter Used to model the channel S(z), where Use the momentum LMS algorithm to update the weight coefficient, u s for The step size parameter of the modeling filter's error signal Main noise d(n)=p(n)*x(n), anti-noise signal y′(n...

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Abstract

The invention provides a modular design method of an ANC (Active Noise Control) system based on an FPGA (Field Programmable Gate Array). Six modules including a white noise signal generator, a convolution module 3, a weight updating module 2, a convolution module 2, a weight updating module 1 and a convolution module 1 are mainly used. The invention aims at accelerating the operating speed of theANC system. The method has an innovation point that in order to solve the problem of low convergence speed of an LMS (Least Mean Square) algorithm in a practical noise environment, the ANC based on anMLMS (Momentum Least Mean Square) algorithm is provided. One weight updating module and two convolution modules are used for realizing the MLMS algorithm in the ANC system; and in order to realize the real-time modeling on a secondary path, one weight updating module and one convolution module are used for realizing the MLMS algorithm. The modular design method of the ANC realizes a fast design and the advantage of fast convergence. In order to accelerate the operating speed of the system and the data throughput capacity of the system, a parallel processing mode is used for designing the ANCsystem.

Description

technical field [0001] The invention belongs to the technical field of noise elimination, and in particular relates to the research on the modular design method of an active noise control system based on FPGA. Background technique [0002] Noise pollution has gradually become an urgent problem in large and medium-sized cities, especially in areas where residential buildings and main roads are in close proximity. Long-term exposure to this noise environment will cause serious harm to people's physiology and psychology, and general noise interference will affect people's normal work and life. The main way to solve the noise pollution in modern cities is to install fully sealed sound-proof windows and double-glazed windows. This measure will increase exponentially with the increase of floors in urban high-rise buildings, and can only block the middle and high frequency bands. noise, and the noise control effect in the low frequency band is very poor. However, in the hot summe...

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/17854G10K11/17817G10K2210/3012G10K2210/3028G10K2210/3018G10K2210/3052
Inventor 袁军吕韦喜王巍张涛李军
Owner 重庆中易智芯科技有限责任公司
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