Or operate your receiver at absolute zero so there is no thermal noise? :D On a more serious note, how I do preamble detection is the following:
* Figure out the sample sequence of your TX'ed preamble sequence, use this as a match filter. * Tag the magnitude of the match filter and run through the peak detector block, which should locate the spike in energy from the preamble. * When this happens, your packet frame begins one sample in the future (post preamble). >From me, this seems to work pretty well....all things considered. On Thu, Jun 23, 2011 at 11:48 AM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 23/06/2011 2:31 PM, Nick Foster wrote: > >> >> Why would you set the amplitude of the preamble differently than the >> actual data? >> >> --n >> > In the hopelessly-naive assumption that the preamble can be made to be > "perfect" through brute-force transmit power. > > Like you observed earlier, correlation is the correct way to detect a > preamble. > > > > ______________________________**_________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/**listinfo/discuss-gnuradio<https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> >
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