Limitations of the Fourier Transform

Sat, 20 Jun 2015 16:46:54 +0530

My implementation of the Hilbert Huang transform (PyHHT) is quite close to a beta release. After nearly three years of inactivity, I’ve found some time to develop the PyHHT library in the last few weeks. In all this time many people have written to me about a lot of things - from the inability to use the module because of the lack of documentation, to comparison between the results of HHT and conventional time series analysis techniques. And now the time has come when I can no longer avoid writing the documentation. But as I write the documentation, I’ve found that I need to re-learn the concepts which I learned back when I started writing this module. It is out of this learning cycle that came my last blog post.

Edge Effects in Empirical Mode Decomposition

Fri, 18 Apr 2014 12:10:15 +0530

It has been a little over three years since I started working on a Python implementation of the Hilbert Huang Transform. When I first presented it at SciPy India 2011 (video) it was just a collection of small scripts, without packaging, testing or even docstrings. Over time PyHHT has garnered some interest, and I have, since the last few weeks, found the time to regularly work on it. I have been able to come up with a decent implementation of empirical mode decomposition, pretty much in line with everything described in the original paper by Huang et al. The other parts of HHT, like the Hilbert spectrum and its time frequency representations are right around the corner.

Emd on Jaidev's Blog

Limitations of the Fourier Transform

Edge Effects in Empirical Mode Decomposition