Re: [Discuss-gnuradio] Active Cancellation

2010-06-21 Thread jan acosta
Well it depends, on the problem. If you have a radio that is transmitting in the same channel as another radio, then you can directly feed one to the noise channel and receive the other at the antenna. I know in radio astronomy people have been using this technique to cancel interference from the

[Discuss-gnuradio] (WBX+USRP) Unknown signal at the middle of any FFT plot in receive mode

2010-08-23 Thread jan acosta
Hello, I am currently testing two USRP radios with 3 WBX transcievers. When I test the receive path, I would use gnuradio companion and go from USRP source to FFT plot. However, I see that at every center frequency of the FFT window there is a signal even though I am not inputting anything. The

Re: [Discuss-gnuradio] Parallel programming

2011-01-10 Thread jan acosta
Thanks. Yes, my block has internal data-feedback [using signal processing block output to calculate new FIR filter coefficients, a trait common in adaptive filters]. It runs with 1 FIR Filter pretty quickly with 1 core no problem, but once I start pushing it to 5 and up, my computer can't keep up

Re: [Discuss-gnuradio] Building an RF Front end for DSP FPGA Kits with ADCs

2011-01-13 Thread jan acosta
I have one already, but you can't receive anything above - 10 dBm. Plus I'd like to gain FPGA programming experience. - Jan On Thu, Jan 13, 2011 at 10:33 AM, Euripedes Rocha Filho < rocha.euripe...@gmail.com> wrote: > Why not just buy a USRP + WBX? > > 2011/1/13 sirjanselot > >> >> Hello, >> >