[Discuss-gnuradio] Which type of block do I use here?

Hi Say I want to create an energy detect block that takes a certain number of input samples, measures the (signal) power and compares it against a threshold. Only if the power exceeds the threshold, the block has to make the decision that some genuine signal is being received and then move only th

Re: [Discuss-gnuradio] Using fft::fft_complex in an out-of-tree moudle

Thank you Ron, I got it. Best Regards, Van-Ly Van-Ly Nguyen, Research Assistant, Signals and Systems Laboratory - SSL Faculty of Electronics and Telecommunications - FET University of Engineering and Technology - UET Vietnam National University, Hanoi - VNU Phone: (+84) 97 881 9406 On Wed, M

Re: [Discuss-gnuradio] Using fft::fft_complex in an out-of-tree moudle

You have to add FFT to the top level CMakeLists.txt file. Like so: set(GR_REQUIRED_COMPONENTS RUNTIME FFT) Ron On 05/19/2015 07:56 PM, Nguye^~n Va(n Lý wrote: Hi all, I created an out-of-tree module for my personal project. In one block, I need to perform FFT and IFFF, so I put "*#include *"

[Discuss-gnuradio] Using fft::fft_complex in an out-of-tree moudle

Hi all, I created an out-of-tree module for my personal project. In one block, I need to perform FFT and IFFF, so I put "*#include *" in the header file, and then declare *fft::fft_complex *d_ifft;* ​In the .cc file, I wrote *d_ifft = new fft::fft_complex(64, false, 1);​* ​Then I can compile witho

[Discuss-gnuradio] gr-modtool cpp generation issue

I am in the process of converting some 3.6 modules to 3.7. So I am generating new modules then adding the code from the old modules. I have one module that takes a filename as a parameter so it is declared like this in this test module: testfilename_impl::testfilename_impl(unsigned short printing,

[Discuss-gnuradio] Question about reverse-engineering a new mode

This is a bit of an idle question, but I'm hoping some knowledgable folks on here can offer advice. Mostly I'm trying to understand better what I don't know, and the size of the challenge, before jumping in to a project: I'd like to try decoding some AVL traffic in the 700-MHz band (GPS locations

[Discuss-gnuradio] Syncronising transmitting and receiving streams to and from a USRP

Hi All I'm using N210 USRP with XCVR2450 (Rev2) hardware. I'm writing an out of tree module for GRC in C++ for a consensus synchronisation system. The block takes in a certain number of samples from the USRP, then estimated when it needs to transmit its signal. I set the transmit time for the o

Re: [Discuss-gnuradio] Accessing Filter Kernels in Python

On Mon, May 18, 2015 at 10:14 PM, Ben Peiffer wrote: > Hello, > > I am looking for help in using the filter kernels in python. In > particular, I want to use the filter.kernel.fir_filter_fff. > > Is this even possible? I have poked around quite a bit and have not been > able to figure out how t

Re: [Discuss-gnuradio] UHD: undefined symbol uhd_time_spec_t

Hi Marcus, You were right, I did the modifications on the CMakeList.txt file on the working folder, but I forgot to go into the CMakeList.txt on tue lib/ folder. Now that I went thrhough the lib/CMakeList.txt and did the proper modificacions, the tests are passed and I can continue working. Thank

Re: [Discuss-gnuradio] UHD: undefined symbol uhd_time_spec_t

Hi Nicolas, so the good news is that you're doing things right: the CMake output contains this line: > Checking for GNU Radio Module: UHD which indicates that you did a set(GR_REQUIRED_COMPONENTS RUNTIME UHD PMT) (or even more), so the libraries that CMake *should* link against are being found. Y

[Discuss-gnuradio] UHD: undefined symbol uhd_time_spec_t

Hi all, I'm having right now problems with a implementation of a time tag in a block that I'm writing. I'm basically writing a burst tagger with SOB, EOB and TX_TIME tags. The first two are working, but the third (the one that uses a UHD function), is giving me problems. I recognized that the pa