Real-time Implementation of Vector Hilbert-Huang Transform

Zheng Zhu, Yilin Wang, Ping Cai
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引用次数: 5

Abstract

Hilbert-Huang Transform (HHT) is a kind of signal analysis method proposed by Huang in the late 20th century. The combination of HHT and vector signal processing is called vector HHT. To solve the problem of too much computational cost in the real-time implementation of vector HHT, this paper makes some improvement on vector HHT for real-time operation, including the improvement on sifting method, curve fitting, treatment of boundary and stop condition. Both performance and operation speed are considered in the improvement. The improved algorithm has much less computational cost, with performance basically remaining unchanged. A parallel signal processing system composed of multiple chips digital signal processor (DSP) is designed, in which vector HHT is implemented real time. The result obtained from the parallel signal processing system shows that the system met the need of data real time processing, and has good performance.
矢量Hilbert-Huang变换的实时实现
希尔伯特-黄变换(Hilbert-Huang Transform, HHT)是20世纪末由黄提出的一种信号分析方法。HHT与矢量信号处理的结合称为矢量HHT。为了解决矢量HHT实时实现中计算量过大的问题,本文对矢量HHT进行了一些改进,包括筛选方法、曲线拟合、边界处理和停止条件的改进。在改进时考虑了性能和运行速度。改进后的算法计算量大大减少,性能基本保持不变。设计了一种由多片数字信号处理器(DSP)组成的并行信号处理系统,实现了矢量HHT的实时实现。仿真结果表明,该系统满足了数据实时处理的需要,具有良好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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