> 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 <mailto:johnat...@corganlabs.com>> wrote: > > On Wed, Aug 5, 2015 at 12:51 PM, Martin Braun > <martin.br...@ettus.com <mailto: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:digital/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 > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org <mailto: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
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