On Tue, Dec 29, 2015 at 11:24 AM, Ekko <[email protected]> wrote:
> hello bob > this problem have been solved,now my fec&gmsk is worked > but i got a new problem > this is my fec+gmsk grc > http://i.imgur.com/ZH2qhh6.png > > and this is my gmsk without fec > http://i.imgur.com/zJVskUX.png > > when i run these two grc,i got a similar value of ser > > i think that in the way of gmsk&fec,i will got a error rate value smaller > than the single gmsk,but i did not got it, > so i think there is somethin wrong in my grc,hope someone who can help me > to check my grc ,or give me sone instruction about the using of fec. > > thank you > > --Ekko > Ekko, It might be worth using the exact same graph for both tests but use the Dummy Encoder and Dummy Decoder variables for the FEC codes. These are just pass-through "codes" that allow you to easily use the same structure with and without any actual coding. Also, you should run "ber_curve_gen.grc" that comes as an example with gr-fec. This will give you an idea of what kind of BER correction you should expect for the different codes. Tom > 2015-12-29 13:15 GMT+08:00 bob wole <[email protected]>: > >> Ekko, >> >> Add a Tag debug block after your packet encoder and see if there are any >> tags coming out of it. I think packet encoder is not passing your tag. If >> that is the case, move your stream to tagged stream block after the packet >> encoder just before the FEC extended tagged encoder. Hope it helps. >> >> >> -- >> Bob >> >> >>> >>> this is the address of picture >>> >>> http://imgur.com/2EQiY6O >>> >>> sorry to send two e-mails >>> >>> >>> >>> >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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