Kay, Freq offset can be added by multiplying the baseband data with complex-exponential. In GR this can be done by any of the following ways 1. Sine Source and Multiply block or 2. Freq Translating FIR Filter 3. Channel Model
-Adeel On Thu, Jul 25, 2013 at 8:26 PM, Yingjie Chen <ocg...@gmail.com> wrote: > Hi guys, > Thanks in advance. > > Since freq. offset is time related, like exp(2pi * fΔ * t), how can I > generate freq. offset in gnuradio? > Normally, freq. offset exists due to mismatched oscillators between > transmitter and receiver. > Is that possible get the same freq. offset effect mentioned above, merely > through modifying some code in GunRadio but not modifying the RF hardware > in USRP. For example, if I want to add 1KHZ offset in sender in data > symbol(not preamble part,to avoid freq. offset correction), to see if the > receiver can still succeed to decode the data, how should I do? Which part > should I locate at after IFFT moving the samples to base band? > > Thanks again. > > Best, > Kay > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
