On Fri, Mar 8, 2013 at 8:47 PM, manjusha <yandamuri.ma...@gmail.com> wrote:
> ber_before_tx.png > <http://gnuradio.4.n7.nabble.com/file/n40088/ber_before_tx.png> > ber_tx.png <http://gnuradio.4.n7.nabble.com/file/n40088/ber_tx.png> > > It doesn't look like you're doing any carrier recovery? Before putting USRP blocks in there, maybe you should try a straight simulation that adds noise and some frequency offset artificially. Get that working, and then connect up the USRP source/sink? > I am trying to find the Bit error rate for a vector signal.I get a error > rate of 0.528(i am assuming it to be 52%) when i don't transmit and an > error rate of 0.625000 when i transmit. > > Am i right on this??i dont understand the logic behind it.. > > Also,is 52% not too high??!!! > Around 50% BER is what you would expect from a random signal. 100% BER is very good since you just need to flip all the bits and you get the right answer! That is also given the input signal statistics are sufficiently whitened/random. > > thank you > > > You might want to take a step away from putting blocks in GRC and just take a look at some of the resources on the GNU Radio wiki about suggested reading: http://gnuradio.org/redmine/projects/gnuradio/wiki/SuggestedReading http://gnuradio.org/redmine/projects/gnuradio/wiki/SuggestedReadingOrder Sanity is hard to come by if you're dealing with magic. Good Luck! Brian
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