Hello Martin Thank you for the help. I try to run "specest_noisy_sinusoid_mtm.py" (Python script is also okey for me). However it does not run "it says no module specest".
By the way I am using windows 8 OS. My goal is is to write a simple python or gnuradio code to perform the following task I have the following variables NFFT=1024 Nav=512 ampl=1 seed=1 Sampling_rate= 10k 1. Generate any real time signal (This could be done by using "gr.noise_source_f (gr.GR_GAUSSIAN, ampl, seed1)). 2. Insert throttle to control the sampling rate (i.e., gr.throttle(1, Sampling_rate)) 3. Compute the FFT (even without windowing) (i.e., NFFT samples at a time) Let me assume that after I compute FFT and I got an "x" vector of size NFFT 4. Compute the square magnitude of x (This could be done by using gr.complex_to_mag_squared(NFFT)) i.e., in matlab y=abs(x).^2 4. sum the first and second Nav samples i.e., av1=sum(y(1:512))/Nav and av2=sum(y(513:1024))/Nav 5. Then display "av1" and "av2" in a text box continuously. Note that in matlab (without GUI it is very easy task) And I feel that there should be some simple approach to do it in GNUradio Thank you again for your help --- Tadilo Endeshaw Postdoctoral Researcher Institut National de recherche Scientifique Centre Energie Matriaux Telecommunications Place Bonaventure, 800 de la Gauchetiere Ouest, Suite 6900 H5A 1K6 Montreal, QC Canada E-mail : tadilo.bog...@emt.inrs.ca tadilo...@yahoo.com (private) Personal home page: https://sites.google.com/site/tadilomypage/ ________________________________________ From: discuss-gnuradio-bounces+tadilo.bogale=emt.inrs...@gnu.org [discuss-gnuradio-bounces+tadilo.bogale=emt.inrs...@gnu.org] On Behalf Of Martin Braun [martin.br...@ettus.com] Sent: July 30, 2014 10:01 AM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Spectrum sensing Simulation Only On 07/30/2014 03:37 PM, Tom Rondeau wrote: > The easiest way to average is to use the single_pole_iir_filter to > smooth out the data stream. But note that you're coming out of the FFT > block as a vector. You can set the vector length of the single pole IIR, > but I'd have to review exactly what that means mathematically. It > probably smooths the entire vector as one as opposed to smoothing over > index i in each vector. You might have to play around with that. gr-specest might help you with that (pybombs install gr-specest, or https://github.com/kit-cel/gr-specest). M _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio