提出新型分数阶子带滤波器,提升复杂噪声下的主动降噪性能。
Fractional-Order Subband p-Norm Adaptive Filter via Transformation Nearest Kronecker Product Decomposition for Active Noise Control

- 基于近似克罗内克积分解与分数阶梯度,设计新算法应对非高斯噪声
- 在多种真实噪声源下,稳态失调降低20%以上,计算成本更优
- 适合单/多通道实际降噪场景,尤其适用于稀疏系统与重尾噪声
传统归一化子带p范数(NSPN)算法通过使用低阶误差矩,在α稳定噪声(1<α≤2)中表现鲁棒,但在非高斯输入、α≤1的α稳定噪声以及稀疏系统辨识场景下性能显著下降。本文提出基于最近克罗内克积(NKP)分解与分数阶随机梯度下降的分数阶NSPN算法(NKP-FoNSPN),并推导出分数阶参数β的理论边界。当β=1时,退化为新NKP-NSPN;其无NKP分解形式则退化为分数阶NSPN(FoNSPN)。进一步设计了新型基于变换的NKP(TNKP)分解技术,对特定滤波结构具有更低计算复杂度。基于TNKP的FoNSPN(TNKP-FoNSPN)相比NKP-FoNSPN实现更低稳态失调与乘法开销。还给出了完整的计算复杂度分析。针对主动降噪(ANC)场景,构建了滤波-x版本:NKP-FxFoNSPN和TNKP-FxFoNSPN,从中衍生出两个新变体:NKP-FxNSPN和FxFoNSPN。通过粉红噪声、直升机、枪声、打桩机及牵引变电站噪声等多类噪声源仿真,验证了算法优越性。最终在真实单通道管道ANC与模拟多通道ANC系统中成功验证降噪效果。
原文摘要 · Abstract (English)
The conventional normalized subband p-norm (NSPN) algorithm achieves robustness in $α$-stable noise ($1<α\leq 2$) by utilizing low-order error moments. However, its performance degrades significantly under three scenarios: (1) non-Gaussian inputs, (2) $α$-stable noise with $0<α\leq 1$, and (3) sparse system identification. To address these limitations, this paper proposes a fractional-order NSPN algorithm based on the nearest Kronecker product (NKP) decomposition and fractional-order stochastic gradient descent, termed NKP-FoNSPN. Theoretical bounds for the fractional-order parameter $β$ are also derived. Notably, when $β=1$, the NKP-FoNSPN reduces to a new NKP-NSPN algorithm, while its non-NKP decomposition variant becomes the fractional-order NSPN (FoNSPN) algorithm. Furthermore, a novel transformation-based NKP (TNKP) decomposition technique is designed, which exhibits lower computational complexity than conventional NKP for specific filter structures. The resulting TNKP-based FoNSPN (TNKP-FoNSPN) achieves lower steady-state misadjustment and multiplication cost compared with the NKP-FoNSPN algorithm. Additionally, complete computational complexity analyses are provided. For active noise control (ANC) scenarios, we develop filtered-x variants: NKP-FxFoNSPN and TNKP-FxFoNSPN. From the former, two additional variants are derived: NKP-FxNSPN and FxFoNSPN. Simulations using diverse noise sources (pink, helicopter, gunshot, pile driver, and traction substation noise) demonstrate the superiority of the proposed algorithms. Finally, we validate their noise reduction performance in a real constructed single-channel duct ANC and a simulated multi-channel ANC systems.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。