On Fri, Aug 28, 2009 at 5:22 PM, Eric Blossom<e...@comsec.com> wrote: > If you're trying to send a sine wave, this will work much better: > (Generates a complex sinusoid == exp(jwt)) > > sig_source_c -> head -> usrp.sink_c > > Or you could use a hilbert transform to generate the quadrature > component. float_to_complex will be setting Q to zero the way you're > using it.
Yes, setting Q to zero was the original idea. The whole point of using a sine wave was to have a better estimation of when the QAM signal actually started, but this "solution" gave me another problem to work on :) My question is why the received signal has sinusoidal components on both I and Q given that the wave has been "translated" to 2.5G (upon tx) and then back to DC (after the FPGA in rx). Should I not expect two impulses at +- 2M? Instead, what I get is a single impulse at aproximately -3kHz, regardless of the frequency set on the sig_source. > Eric > -- Igor Almeida _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
