hello Michael as you said,there are not enough data to feed the packetizer ,
now i use the dest file(generated by the same grc) as the source , 1--->i think that the dest is generated by the grc,so the data in dest file must can feed the packetier, is it right when i use dest file (generated by the same grc,now called A) as source file,to run my grc ,i got a new dest file (called B) i campare the data in A and B there is also some data lost. if my guess no.1 aboved is right , the data lost may not be caused by （ there was not enough data in the file to feed the packetizer） hope for your correct. thank you --Ekko 2016-01-07 2:26 GMT+08:00 Michael Berman <[email protected]>: > Ekko, > > > > It has been a while since I have dealt with this kind of issue with the > digital coms, but I have run into this. The problem I found was that there > was not enough data in the file to feed the packetizer properly. There are > probably several work arounds for this, but the simplest would be to pad > the data up to the exact amount the packetizer needs to generate the > packets and send them along. You can check if this is the case by varying > the size of your file. If you change the number of bytes in the file, you > should see the amount left out varying; if you add bytes slowly you should > see a breakover point near a multiple of the number of bits the packetizer > needs that will create a small or no amount of data not transmitted. > > > > Michael > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Ekko > *Sent:* Wednesday, January 06, 2016 9:01 AM > *To:* [email protected] > *Subject:* [Discuss-gnuradio] how to send a complete file > > > > hello > > > > I'm using gnuradio to simulation the gmsk tx/rx with a file > > this is my grc > > > > you can see ,i am using a file_sink and file_source, > > the file_source is set to not repeat,i want to send this file ony one time. > > > > and my source file‘s size is 140KB > > > > after i run this grc (i am sure the send is stop ) > > > > i check the dest file,the size of whitch is 139.3KB > > > > then i compare two file > > just like > > > > > we can see that some data is lost(exactly 22 lines)， > > so i want to know how can i send a complete file, just i send 140KB,and > recieved 140KB, > > then stop. > > > > > > thank you > > > > -Ekko >
_______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
