Was it the harmonics that prevented the hackrf from transmiting then ? Oddly when eyeballing the data and gnuplot the data looks almost identical except for my data being perfectly centered, the higher & low frequency are exactly the same but for the phase shift.
would that make any difference? On Jun 29, 2015 3:42 PM, "Michael Ossmann" <[email protected]> wrote: > On Sun, Jun 28, 2015 at 08:49:40AM -0700, Peter Shipley wrote: > > > > As you may have guessed, my generated IQ stream was made with a loop > > calling sin/cos and timing the transitions to times where I&Q can swap > > symmetrically ( without jumping ). > > what is then proper method for making phase transitions? > > One method is to smoothly lower the amplitude to zero at the transition > and then back up to full amplitude by mid-symbol. This is done, for > example, in PSK31. A simpler approach is to use an FIR low pass filter > on your waveform before transmission. > > Mike >
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