Yes .. Thanks ! On Thu, Aug 6, 2015 at 3:07 PM, Johannes Demel <uf...@student.kit.edu> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > As a rule of thumb with expected error rate BERe: > > num simulation bits: (1 / BERe) * 100 > that's more like a minimum. It's probably better to go for * 1000. > Also if you use BER block, it has a parameter ' BER Min. Errors'. As > long as it didn't count at least this amount of errors it'll not > output anything. > Depending on your code and your SNR 8-12dB I'd expect you need at > least 1Gbit or in case of SNR=12dB more towards 100Gbit in order to > obtain meaningful results. > Hope that helps. > > On 06.08.2015 11:31, monika bansal wrote: > > 160000 bits for all snr values.,... > > > > On Thu, Aug 6, 2015 at 2:45 PM, Marcus Müller > > <marcus.muel...@ettus.com> wrote: > > > >> Taking a blind guess here: How many samples do you simulate for > >> Eb/N0 = 8dB? And for 10dB? And for 12dB? > >> > >> Best regards, Marcus > >> > >> > >> On 06.08.2015 10:58, monika bansal wrote: > >> > >> Yes Marcus... and i used delay block at the output of the > >> demodulator to make output bits align with input bits. Now it is > >> tracing the theoretical curve till 9 db but after that error is > >> not reducing. > >> > >> I am attaching the curve. Why is this happening ?? > >> > >> On Thu, Aug 6, 2015 at 2:03 PM, Marcus Müller > >> <marcus.muel...@ettus.com> wrote: > >> > >>> How should i calculate the error now? > >>> > >>> That pretty much depends on what *you* want to measure -- > >>> obviously, these bits are lost, so practically, this increases > >>> your BER. If you want to demonstrate asymptotic behaviour, > >>> however, then you could just increase the length of your > >>> simulation until a few bits lost at start and end just don't > >>> matter anymore. > >>> > >>> Greetings, Marcus > >>> > >>> > >>> On 06.08.2015 06:47, monika bansal wrote: > >>> > >>> Hii Thanks for your responses. > >>> > >>> The problem is this channel model is eating some initial 6 > >>> bits(3 qpsk symbols) and last 10 bits(5 qpsk symbols). Because > >>> of this index of output symbol is different fron input which > >>> is resulting in error for all snr ranges. You can see the > >>> output for noise_volage =0.0 > >>> > >>> Input = (0L, 0L, 2L, 3L, 1L, 2L, 1L, 1L, 2L, 3L, 0L, 1L, 0L, > >>> 1L, 1L, 3L, 2L, 3L, 1L, 0L, 2L, 0L, 3L, 2L, 2L, 1L, 3L, 2L, 3L, > >>> 0L, 2L, 2L, 0L, 1L, 2L, 3L, 3L, 0L, 2L, 2L, 0L, 2L, 3L, 3L, 2L, > >>> 2L, 3L, 0L, 0L, 0L, 1L, 0L, 2L, 2L, 2L, 0L, 3L, 0L, 1L, 1L, 3L, > >>> 0L, 1L, 3L, 3L, 3L, 0L, 0L, 2L, 0L, 1L, 1L, 0L, 2L, 3L, 2L, 2L, > >>> 3L, 2L, 3L) > >>> > >>> Output = (3L, 1L, 2L, 1L, 1L, 2L, 3L, 0L, 1L, 0L, 1L, 1L, 3L, > >>> 2L, 3L, 1L, 0L, 2L, 0L, 3L, 2L, 2L, 1L, 3L, 2L, 3L, 0L, 2L, 2L, > >>> 0L, 1L, 2L, 3L, 3L, 0L, 2L, 2L, 0L, 2L, 3L, 3L, 2L, 2L, 3L, 0L, > >>> 0L, 0L, 1L, 0L, 2L, 2L, 2L, 0L, 3L, 0L, 1L, 1L, 3L, 0L, 1L, 3L, > >>> 3L, 3L, 0L, 0L, 2L, 0L, 1L, 1L, 0L, 2L, 3L) > >>> > >>> > >>> Input = (0L, 1L, 0L, 2L, 0L, 1L, 1L, 3L, 2L, 3L, 3L, 1L, 0L, > >>> 2L, 2L, 0L, 0L, 1L, 1L, 1L, 0L, 0L, 3L, 2L, 3L, 1L, 1L, 2L, 1L, > >>> 0L, 3L, 0L, 0L, 0L, 3L, 0L, 3L, 2L, 1L, 0L, 3L, 1L, 3L, 1L, 1L, > >>> 3L, 1L, 2L, 0L, 1L, 0L, 3L, 1L, 0L, 3L, 2L, 1L, 2L, 3L, 3L, 2L, > >>> 1L, 3L, 0L, 1L, 2L, 3L, 3L, 0L, 0L, 0L, 2L, 3L, 3L, 1L, 3L, 3L, > >>> 1L, 0L, 3L) > >>> > >>> Output = (2L, 0L, 1L, 1L, 3L, 2L, 3L, 3L, 1L, 0L, 2L, 2L, 0L, > >>> 0L, 1L, 1L, 1L, 0L, 0L, 3L, 2L, 3L, 1L, 1L, 2L, 1L, 0L, 3L, 0L, > >>> 0L, 0L, 3L, 0L, 3L, 2L, 1L, 0L, 3L, 1L, 3L, 1L, 1L, 3L, 1L, 2L, > >>> 0L, 1L, 0L, 3L, 1L, 0L, 3L, 2L, 1L, 2L, 3L, 3L, 2L, 1L, 3L, 0L, > >>> 1L, 2L, 3L, 3L, 0L, 0L, 0L, 2L, 3L, 3L, 1L) > >>> > >>> How should i calculate the error now? Should i use Delay > >>> block? > >>> > >>> On Thu, Aug 6, 2015 at 2:34 AM, Johnathan Corgan < > >>> <johnat...@corganlabs.com>johnat...@corganlabs.com> wrote: > >>> > >>>> On Wed, Aug 5, 2015 at 12:51 PM, Martin Braun < > >>>> <martin.br...@ettus.com> martin.br...@ettus.com> wrote: > >>>> > >>>> > >>>>> Try > >>>>> > >>>>> noise_voltage = self.EbN0_to_noise_voltage(EbN0)/sqrt(2) > >>>>> > >>>>> the original berawgn.py was already buggy, because it > >>>>> didn't follow a recent change in the noise power. I've > >>>>> submitted a patch, but it probably won't be merged before > >>>>> the release cycle is reset (cf > >>>>> > >>>>> https://github.com/gnuradio/gnuradio/compare/master...mbr0wn:digit > al/berawgn_fix_noisepower?expand=1 > >>>>> > >>>>> > ). > >>>> > >>>> > >>>> ? This did get merged for 3.7.8 release.? > >>>> > >>>> > >>>> -- Johnathan Corgan Corgan Labs - SDR Training and > >>>> Development Services Intro to SDR Class - Aug. 31-Sep. 1, > >>>> Columbia, MD Intro to SDR Class - Sep. 3-4, Santa Clara, CA > >>>> <http://corganlabs.com>http://corganlabs.com > >>>> > >>>> _______________________________________________ > >>>> Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org > >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >>>> > >>>> > >>> > >>> > >>> _______________________________________________ > >>> Discuss-gnuradio mailing > >>> listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/d > iscuss-gnuradio > >>> > >>> > >>> > >>> > >>> > _______________________________________________ > >>> Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org > >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >>> > >>> > >> > >> > > > > > > > > _______________________________________________ Discuss-gnuradio > > mailing list Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.22 (GNU/Linux) > > iQIcBAEBAgAGBQJVwyrLAAoJEO7fmkDsqywMumwQAJ9YXsjZrX051rtAp61Rrbdp > PqsblRAqNAy2kXNGVX+Ag1B9BUnSqsIpSZVgYCvXqiPH8Cy9qAGFv3EkPPk80BN0 > O+4zzIFCovnPXHHnJB90ntyUUvHZlUd5TTDRn0RNzMSvI1ABg+ssk7pUYM424vvO > wTMBA4yP41aCr7nbYDowpMd+GnzdC0nwpxpTVdEVX8yS8PlhECAv45/U2Ze/6CT2 > EcK3pUIZRTgZlWezrS1mqD5afGqNYPHz1WhPQx05Hx2OjyP2wNwPx9RA6VKhIosU > iywpvz4zdpbaKFEpgTwB6h0w0+CeclnqmipSP+hPIkUmFa7kbQyzNjAn5WTYfQrd > Ne+v2W9ztxQlbvihswVmHdrBxwk2/gDlL6pzBWy6zf2T0NfAJxlW/zcOQlVc+fEs > tL5l0ZVNha0Ppam2I6jxKzINMDOm3Gln0h3F75FD9CpcTyHRKxV9a8Sg4BCi4jei > +l6rnT4mhQk6RirDBOXUwWIXLbk28RLAWYNL8Jyn0n7M50ax7WMGXBS+yDUf/G1A > mmiLAFm1ATZRHBN1Aw99DXkI/LN+qp10oUYkKRcx7Ji3z6Oc+CKIqE0r9QBck0qS > z0JfxOG9N1z+iEgWJ/Ui4GZx85zHJVkmyHQs72QTecoFnhO1j/GWqeRRAyyWDTJ8 > zMsQVtreQnqYEPkSSQKK > =rixl > -----END PGP SIGNATURE----- > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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