On Sat, Aug 6, 2011 at 3:54 PM, Marcus D. Leech <mle...@ripnet.com> wrote:
> ** > On 08/06/2011 06:27 PM, shantharam balasubramanian wrote: > > Hi > I have been working in usrp2 testbed, and I have been modifying the > benchmark_tx and rx programs for my project. There have been situations > where I was supposed to introduce noise to find out BER. I did that by > giving lower transmitter amplitude values. But very low values cause packet > loss along with higher BER values. I just want to know if there Is there > anyway to just cause high BER values, without causing packet loss? Is there > any way I can do that inside the program or should I do it by any other way > e.g.by using some noise producing source? > > Well, in real-world radio communications systems, low-SNR *does* cause > packet loss. That's entirely expected. Nature doesn't discriminate > between packet-synchronization data, and the actual payload data. > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > Perhaps he could design a long preamble sequence, many symbols, and use that to correlate against. That way you can assure packet lock, but symbol decoding might not always work.
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
