filter,active

Design of dynamic filter for precision vibration measurement

精密振动测量用动态滤波器设计

This paper introduces the design and realization of the FIR dynamic filter by EP1C6Q240 of Cyclone of Altera Corporation, showing the hardware diagram of the filter and the process of calculating parameters, and compares and analyzes the B mode ultrasound images created by using the dynamic filter and by using the const filter.

介绍了利用Altera公司Cyclone系列的EP1C6Q240型FPGA芯片,设计并实现了一个FIR型动态滤波器。

Fourth order cumulant Variable step-size Sign Momentum filtering algorithm(FVSM)was proposed based on analyzing the non-Gaussian features of underwater acoustic environment and utilizing the advantages of Momentum Least Mean Square(MLMS)algorithm,LMS algorithm,variable step-size algorithm and sign one.

针对水下环境噪声的非高斯性特点,利用最小均方算法、动量最小均方算法、变步长算法和极性算法的性能,将基于短时相关的自适应谱线增强器修改为基于短时相关动量滤波算法的自适应谱线增强器(SCMBALE),提出了四阶累积量变步长极性动量滤波算法,将基于该算法的自适应谱线增强器(FVSMBALE)、基于动量最小均方算法的自适应谱线增强器(MLMSBALE)及基于短时相关动量滤波算法的自适应谱线增强器(SCMBALE)依次串联起来,构造出基于串联动量滤波器的自适应谱线增强器(SMFBALE)。