Hello Joao, It works (caveat to a point)!
I have tested it with QPSK Modulated signals. It works to a point, but the Channelized output is not completely correct. Channel-0 time series (real and imaginary components) are good, but the time series from the other channels are a little distorted. I have written the code for a channelizer in Matlab and the output modulated time series is perfect on all channels. I may have to write one, which I was not planning on doing. George On Tue, Dec 22, 2020 at 10:18 AM <[email protected]> wrote: > Here you are! > > I just downloaded the .xml file and renamed it to .grc. It seems to work, > but I am using GNU Radio 3.8.2.0. See if it works for you. > > Cordially, > > João > > On December 22, 2020 at 1:35:29 pm -03:00, George Edwards < > [email protected]> wrote: > > Hi Ron, > > That is good! I have Gnuradio 3.7.13.4 on one of my computers. Please send > me the grc file as an attachment as soon as you can. > This way, I can learn how to use the Gnuradio Polyphase Channelizer block. > > Thank you! > > Respectfully, > George > > On Tue, Dec 22, 2020 at 8:58 AM Ron Economos <[email protected]> wrote: > > It's a GNU Radio 3.7 flow graph. It can be converted by GNU Radio 3.8. > > Ron > On 12/22/20 07:47, George Edwards wrote: > > Hi Ron, > > Thanks again for your help. > > When I click on the link you provided, I get the XML file. Please send me > the actual grc file as a standalone. > > Thank you! > > Regards, > George > > On Mon, Dec 21, 2020 at 2:47 PM Ron Economos <[email protected]> wrote: > > You should probably use an add block instead of Streams to Stream. > Here's an example flow graph. > > http://www.w6rz.net/pfb-filter-10.grc > > Ron > > On 12/21/20 11:20, George Edwards wrote: > > Hello, > > > > I have three signals routed to the Gnuradio Polyphase Channelizer > > Block. The system operates at a sample rate of 90 kHz with 3 channels > > spaced 25 kHz apart. One channel is centered around DC and the other > > two at +/-25 kHz. The 3 waveforms are routed into a Gnuradio Streams > > to Stream Block, so that a simple concatenated stream flows into the > > Gnuradio Polyphase Channelizer. I also set the Channelizer Block to > > use 120 Taps and provide 3-outputs. Here are my questions on observing > > the outputs > > > > Q1. I was expecting each output (block set to 3 outputs) to be at the > > sample rate (90 kHz/3 =) 30 kz in each of the 3-plots. The plots show > > a sample rate based on the original rate of 90 kHz. Why is this? > > > > Q2. I expected each output waveform to be centered around DC, but they > > were instead centered around -25 kHz. Why? > > > > Q3. The output bandwidth for each waveform seems a little bigger than > > the input, why? > > > > I will appreciate any help that assists to point me in the right > > direction. > > > > Regards, > > George > > >
