hi, i am trying to get the USRP PSK Tx and Rx example to work:
in my VI, its just the base example, modified with a text file read-in on the transmitter, and a text file writer on the receiver. Its operation is to read a binary sequence from a text file, modulate that bitstream to a carrier, save the modulated bitstream (for checking that the right data has been modulated), then transmit (using 1 USRP 2901, from channel 0 TX1, to channel 1 RX2 with the coaxial cable and -30dB attenuator). That then receives the signal, de-modulates the bitstream and saves the bitstream to a text file.
I have got it to work perfectly with BPSK but any of the other modulation formats (QPSK, pi/4DQPSK, 8PSK, 16PSK, OQPSK etc) that are built in to the example don't work at all.
Not sure if this is user error, a setting issue on the front panel, a code fault within the example or a fault with my modifications .... but surely it wont work for BPSK if my modification was wrong.
Attached the VI's, the receiver sub-VI and the three text files to link to the front panel file paths. As i said, it works perfectly with BPSK but not at all with any of the others.
Hope i can find a solution or get some advice with this, thanks! 🙂
J