基于抗串扰自适应噪声抵消器的参考输入预处理ANC系统

AN ACTIVE NOISE CONTROL SYSTEM WITH PREPROCESSED REFERENCE INPUT USING A CROSSTALK RESISTANT ADAPTIVE NOISE CANCELLER

针对有信号存在情况下的声场有源噪声抵消(ANC)应用,提出了一种能够在降低声场干扰噪声的同时,尽量减小信号失真的ANC系统。通过抗串扰自适应噪声抵消器(CRANC)对传统ANC系统的参考输入进行预处理,降低了ANC系统中信号和噪声之间的相互干扰,在理论上保证了系统具有声场信噪比提升能力。理论分析和仿真对比实验表明,该系统比现有系统具有更可靠的信号背景下ANC能力。

A new active noise control(ANC) system is proposed to cancel noise energy and reduce signal distortion simultaneously for some special applications where the useful signal and disturbing noise exist simultaneously,and consequently traditional ANC systems don't work well.In the new system a crosstalk resistant adaptive noise canceller(CRANC) is applied to preprocess the reference input of traditional ANC systems.With this method,the interference between signal and noise is decreased markedly and the process gain of signal-to-noise ratio is ensured in theory.The theoretical analysis and the contrasted computer simulations show that the proposed system has more reliable performance than the existing systems.