# Gabor transform to GNU Radio **URL:** \ **Category:** GNU Radio\ **Created:** [January 15, 2013, 4:35pm UTC](https://www.ruby-forum.com/t/gabor-transform-to-gnu-radio/229267 "2013-01-15T16:35:40Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![adriatik](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/8c91f0/32.png) [@adriatik](https://www.ruby-forum.com/u/adriatik)\ **Post date:** [January 15, 2013, 4:35pm UTC](https://www.ruby-forum.com/t/gabor-transform-to-gnu-radio/229267/1 "2013-01-15T16:35:40Z")
Hi everyone!Anyone know if there is a block or a function on GNU Radio for make Gabor transform? Thanks! AA ---
**Author:** ![adriatik](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/8c91f0/32.png) [@adriatik](https://www.ruby-forum.com/u/adriatik)\ **Post date:** [January 15, 2013, 6:23pm UTC](https://www.ruby-forum.com/t/gabor-transform-to-gnu-radio/229267/2 "2013-01-15T18:23:46Z")
Hi Adriana, We currently do not (directly) support STFTs in GNU Radio. If you can go with a wavelet transform instead you might want to have a look at gr-wavelet & gsl. Otherwise maybe you can take some of our fftw based code and modify it into doing STFTs? Keep us posted if you get it working, or need help. Cheers, Moritz ---
**Author:** ![adriatik](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/8c91f0/32.png) [@adriatik](https://www.ruby-forum.com/u/adriatik)\ **Post date:** [January 21, 2013, 4:57pm UTC](https://www.ruby-forum.com/t/gabor-transform-to-gnu-radio/229267/3 "2013-01-21T16:57:16Z")
Hi Martin! The flow graph for STFT will be: ``` Gaussian window---| ---> Multiply ``` Signal-\>stream to vector → FFT-----| Or I need an additional block? Thanks! AA Martin B. (CEL) wrote in post #1092409: > On Tue, Jan 15, 2013 at 09:22:53AM -0800, Moritz Fischer wrote: > > > Hi Adriana, > > > > We currently do not (directly) support STFTs in GNU Radio. If you can > > go with a wavelet transform instead you might want to have a look at > > gr-wavelet & gsl. > > Otherwise maybe you can take some of our fftw based code and modify it > > into doing STFTs? Keep us posted if you get it working, or need help. > > Indirectly, STFT can be calc’d by stream-to-vector and then FFT, so > it’s not hard with GNU Radio. If you want averaging, gr-specest should > have all you need. > > The Gaussian window should be available through gr::firdes. > > MB > > – > Karlsruhe Institute of Technology (KIT) > Communications Engineering Lab (CEL) > > Dipl.-Ing. Martin B. > Research Associate > > Kaiserstraße 12 > Building 05.01 > 76131 Karlsruhe > > Phone: +49 721 608-43790 > Fax: +49 721 608-46071 > www.cel.kit.edu > > KIT – University of the State of Baden-Württemberg and > National Laboratory of the Helmholtz Association ---
**Author:** ![adriatik](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/8c91f0/32.png) [@adriatik](https://www.ruby-forum.com/u/adriatik)\ **Post date:** [January 15, 2013, 6:43pm UTC](https://www.ruby-forum.com/t/gabor-transform-to-gnu-radio/229267/4 "2013-01-15T18:43:03Z")
On Tue, Jan 15, 2013 at 09:22:53AM -0800, Moritz Fischer wrote: > Hi Adriana, > > We currently do not (directly) support STFTs in GNU Radio. If you can > go with a wavelet transform instead you might want to have a look at > gr-wavelet & gsl. > Otherwise maybe you can take some of our fftw based code and modify it > into doing STFTs? Keep us posted if you get it working, or need help. Indirectly, STFT can be calc’d by stream-to-vector and then FFT, so it’s not hard with GNU Radio. If you want averaging, gr-specest should have all you need. The Gaussian window should be available through gr::firdes. MB – Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin B. Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT – University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association