Luis, can you please confirm/deny that streaming e.g. into a null sink works?
Thanks, Martin On 23.06.2015 09:16, Luis Grajales wrote: > Hi, > > > I'mtrying to filter 14 frequency bands (channels), which are > dispersingwithinspectrum of 25 MHz (from 2 MHz - 27 MHz to be more > specific) and each band has a different bandwidth. For example: 1th > channel with 198 KHz (bandwidth), 2nd channel with 360 kHz, 3. channel > with 650 kHz, and so on. > > > > Until now, I have tried 3 scenarios on GRC in order to get these 14 > channels and verify that the first step of my project (filtering) is > working. For testing, I used just 4 of the 14 channels to see its > functionality and CPU requirement. > > > > General configuration: > > > USRP N200 ----------- channelizer --- [ch1] -----GUI FFT Sink > > ----[ch2 - ch4] ---- > Null Sink > > > USRP setup -> samp_rate= 25 MHz, and Center Freq = 14,2 MHz. > > > Scenario 1: channelizer = 4 band pass filters. > > Scenario 2: channelizer = 4 Xlating FIR filters. > > Scenario 3: channelizer = Polyphase channelizer, 5 equal channels of 5 MHz. > > > > For the 3 configurations I got massive “DDDDD..” at the console output. > Moreover: > > Scenario 1: CPU 100% and stop the application. > > Scenario 2: CPU between 75 % and 95 %. > > Scenario 3: CPU between 53 % and 95 % > > > > Therefore, I really appreciate if you could give me some tips to avoid > this massive “DDD” messages or alternatives to optimize the resource > consumption for the filter bank, due to the results showed that the band > pass filter (scenario 1) will not be a good option for me, or maybe I > did something wrong. > > > > In the attached files you will find the 3 different GRC configurations. > > > Thanks in advance, > > > Luis Grajales > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
