Hi All, I am working with GNU Radio Companion 3.6 on CentOS. I want to calculate the BER, so I have been using the "Error rate" block. First, I send a random QPSK-modulated signal through a simulated noisy channel (AWGN). I calculate the BER using the function error: BER=0.5*erfc(sqrt(snr)) and compare it to the output of the "Error rate" block. I find almost same results. Second, I send a random QPSK-modulated signal through one USRP and receive it with another USRP. Here is the problem: contrary to expections, the output of "Error rate" block is always 0.5, and it does not vary with the variation of SNR. You find attached the flowgraph of this second scenario. <http://gnuradio.4.n7.nabble.com/file/n47625/gnu-ber.png> I am wondering if this block should not be used with USRPs to calculate the BER. If not, any suggestions? Any help is appreciated. Thank you.
Regards, Azza -- View this message in context: http://gnuradio.4.n7.nabble.com/Error-rate-block-with-USRP-tp47625.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
