HHT >Hilbert Huang Transform
Hilbert-Huang Transform for nonlinear, nonstationary signals
Hilbert-Huang Transform (HHT) technology was invented by Dr. Norden E Huang, a chief scientist and mathematician at Goddard Space Flight Center of NASA. The HHT technology is a highly efficient, adaptive, and user-friendly set of algorithms capable of analyzing time-varying processes. Designed specifically for nonlinear and nonstationary signals, HHT can be used to analyze data in a wide variety of applications. The algorithms also provide increased accuracy when used to analyze linear and stationary signals.

When linear, stationary datasets are used, HHT provides the same solution as the Fast Fourier Transform. However, Fourier Transforms are unsuitable for applications that use nonlinear and/or nonstationary signals. In addition, other technologies, such as wavelet transforms, cannot resolve intra-wave frequency modulation, which occurs in signal systems composed of multiple varying signals. HHT can be used in these applications to provide an accurate method for analyzing nonlinear and/or nonstationary signals or data.

The invention of HHT led to a Federal Laboratory Consortium “Technology Leadership Award” for the HHT method in 2000, as well as recognition as one of R&D magazine’s “R&D 100” (a list of the top 100 inventions of the year) in 2001, the “NASA Government Invention of the Year” in 2003, and the “Service to America Medal” in 2006.

DynaDx Corporation® obtained the exclusive right of HHT techololy and its related applications from NASA. DataDemon software has implemented the latest HHT codes from Dr. Huang and NASA. Due to the IP right, DataDemon is the only commercial software with buidl-in HHT technology. Please send questions to [email protected] on HHT licensing.

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