Hi Laur, Thanks for your advice. I will try to test it.
Best regards, Damon 2015-05-21 19:07 GMT+08:00 Laur Joost <darem...@gmail.com>: > Could be the same thing I'm messing with now: cycle slip. If your data > clock recovery misses a bit, then the two streams you're comparing are no > longer in sync, meaning your result will be essentially random. You can > verify this by saving both streams and comparing them. > > All the best > Laur > > 2015-05-20 22:09 GMT+03:00 Damon <qiu.guowang...@gmail.com>: > >> Hi everyone, >> >> I am testing the BER performance of the gmsk of GNURaido with two USRP, >> one as a transmitter, and another as a receiver. >> I find that the error bits would cause the subsequent bits getting error. >> The received bits are compared with the transmitted bits, and if one bit >> is received correctly, a '0' is marked at the position, otherwise a '1' >> marked. >> In the following test result, the front part of bits are received >> correctly. But I get lots of error bits after some bit which is not >> received correctly. >> >> ...00000000000000000000000000000000000000000000000000000000010010110110001001110010100010... >> How to explain this? >> >> Best regards, >> Damon >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >
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