I just review this mail and want to ask when we try to send the burst data, can we force the carrier phase to be a specified value at every beginning of burst? If it can, does this procedure cost time or just take effect within the sample time?
On Thu, Aug 8, 2013 at 4:53 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 08/08/2013 05:25 PM, Alex Zhang wrote: > >> Hi, >> >> I am transmitting a series of BPSK burst signal and try to observe the >> phase distortion for the BPSK signal on air. But it is found that the >> Phases of different BPSK bursts are different. >> I think this change is caused by the fact that the ADC clock phases are >> different for the starts of every signal burst. But I don't know more >> details on this mechanism. >> >> BR, >> >> Indeed, the carrier phase for discontinous transmission will be at some > random spot every time you start a burst. The hardware doesn't have any > notion of "start the burst only when the clock phase is the same as it > was last-time I sent a burst". Unless you have utter blind luck, your > burst timing > isn't ever going to be an exact multiple of the clock frequency, so > there's no way the carrier phase will be in exactly the same place at the > start of > every burst. > > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Alex,
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