On Wed, May 12, 2010 at 09:06:13AM -0700, David Barton wrote: > Hi, > > I have set up the following simple digital data transmitter: > > > File source -à throttle -à packet encoder --- > DBPSK modulator -à > USRP2 > File size sample rate samples/sym - 2 samples/sym – > 2 Inter rate 32 > -variable 3.125M bits/sym - 1 excess BW > – 0.35 Freq 400M > access code – n/a > grey code - yes Gain 0 > pad for USRP – yes > payload len – 0 > > > What is the transmit (over the air) data rate of this line up ? > > Please explain how the rate is derived. > > Thanks, > Dave
Remove the "throttle", it's not needed. Your baseband sample rate is 100M/32 -> 3.125MS/s You're using 2 samples/symbol, thus your symbol rate is 3.125MS/s / 2 -> 1.5625Msymbols/s And since you're using DBPSK, you're getting 1 bit/symbol, thus your raw over-the-air bit rate is 1.5625Mbit/s Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
