Hi list, I have created a dqpsk transceiver with two usrp2 boards. This is my flow graph in GRC. Tx vector source -> packet encoder -> dpsk modulator(-m dqpsk, 4samples/symbol) -> constant multiplier (*0.1) -> UHD-USRP sink Rx UHD-USRP source -> Low pass filter (Hann window) -> dpsk demodulator -> packet decoder -> file sink When i run the graph, I dont receive anything at the file sink. If I remove packet encoder and decoder, i do receive transmitted vector with few errors. What is this problem? May I know what packet encoder and decoder doing exactly? Even if the demodulated data are wrong, i'm still expecting something at packet decoder. If i just connect modulator to demodulator, it's working fine. ANT
on 2011-06-29 17:43
on 2012-02-29 12:10
Hi, have you solved your problem with the packet decoder block in grc, which is don't working (no output) in the output port ,when the decoder was added to the flow graph. Now i am meeting the same question ,so can u give me some guide. thank u ,very much !!! please reply the email ,firstname.lastname@example.org. thank u!
on 2012-12-03 05:02
Jevons Z. wrote in post #1049432: > Hi, have you solved your problem with the packet decoder block in grc, > which is don't working (no output) in the output port ,when the decoder > was added to the flow graph. Now i am meeting the same question ,so can > u give me some guide. thank u ,very much !!! please reply the email > ,email@example.com. > thank u! Have anyone of u solved the problem. I am also facing the same problem. Thanks in advance. Regards M.G.Praveen kumar