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gnuradio `ImportError undefined symbol`

python,c++,gnuradio
I'm new to GNU Radio and python. I'm trying to write a correlation block, somewhere in my code I use fft filter: gr::filter::kernel::fft_filter_ccc *d_filter; d_filter = new gr::filter::kernel::fft_filter_ccc(1, x_vector); d_filter->filter(noutput_items,in_y,out); I run cmake ../ make and it complies perfectly fine, but when i try make test I'll get this error:...

After I install GnuRadio successfully, I can't find several hundred example files in /usr/local/share/gnuradio/examples

ubuntu,gnuradio
Everybody, I hava a difficulty. When I install GunRadio successfully, , I can't find several hundred example files in /usr/local/share/gnuradio/examples, Which describe in office wiki. I use command line to install this software inUbuntu 14.04LTS sudo apt-get install gnuradio and I can open this software successfully, but I can't find...

Missing line in “Follow UDP Stream” in wireshark

udp,wireshark,gnuradio
I am streaming raw UDP packets (rf data) from GNU Radio to Octave (or any other program). The data consists of 390625 4 byte floats per second. This is 1562500 bytes per second. When GNU Radio streams UDP, there is no header or sequence number in the UDP data, it's...

Add a vertical scrollbar to a wxFrame accross multiple wxPanels

python,wxpython,scrollbar,gnuradio
I want a vertical scrollbar throughout the frame (Top Block). I am able to get vertical scrollbars for the individual panels - Here both the plots are threads plotted by the same class. Here is the code which sets up the top block in gnuradio - class top_block_gui(gr.top_block): def __init__(self,...

How exactly is hier_block 's behaviour different then that of a sync_block in GNU Radio?

python,gnuradio,software-defined-radio
This is a continuation of this question. I understand that we cannot access input_items in __init__ of a sync_block but we can do so in hier_block (eg. here). I wanted to add a panel on the top block frame which can only be done by assigning a panel to self.win...

What should I supply to the “freq” input for Frequency Xlating FIR Filter for GnuRadio Companion?

filtering,gnuradio,software-defined-radio
I am using GnuRadio Companion (GRC) 3.75 and I am trying to use the Frequency Xlating FIR Filter (FXFF) block to perform some filtering. All the tutorials I've seen had this FXFF block take in only 1 input (such as this), which is the complex signal (blue in colour). However,...

GNU Radio io_signature

c++,gnuradio
I'm getting into GNU Radio and after I created a new block, in the main class I have a peace of code like this : square_ff_impl::square_ff_impl() : gr::block("square_ff", gr::io_signature::make(<+IMIN+>, <+IMAX+>, sizeof (<+ITYPE+>)), // input signature gr::io_signature::make(<+OMIN+>, <+OMAX+>, sizeof (<+OTYPE+>))) // output signature { // empty constructor } I don't really...

Is it possible to access work function's variable in __init__ of a GNU Radio block?

python,gnuradio
In the following GNU Radio processing block, I can't figure out who/what passes the value of input_items to the work function in the first place. Is it possible to pass that value to the __init__ function instead? I have a file xyz.py : class xyz(gr.sync_block): """ docstring for block add_python...

float data transmit and receive with tcpip matlab?

matlab,tcp,gnuradio
I am trying to transmit and receive data over TCP/IP (interfacing with GNU Radio): data = rand(1,128); t = tcpip('127.0.0.1',2012,'Timeout', 120); s = whos('data'); set(t,'OutputBufferSize',s.bytes); fopen(t); fwrite(t,data,'double') m=tcpip('127.0.0.1',2022,'Timeout', 120); set(m,'InputBufferSize',s.bytes) fopen(m); fread(m) When I read my data, these are all 0 or 1, I need to get the float data...

GNU Radio on Community radios

python,audio,radio,gnuradio
I'm trying to set GNU Radio as an audio processor for a little community radio in my town. I've already installed GNU Radio and it's working, but I'm not a sound engineer, so I need some help. This is my installation: MIC & Music Player ----> Mixer ----> GNU Radio...