LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

How to use NI USRP2920 to modulate and demodulate signal?

Hi,

 

I've bought two NI USRP2920s and setup a system to modulate and demodulate some signals such as BPSK, QPSK, OQPSK, ...

I use "niUSRP EX PSK Tx.vi" and "niUSRP EX PSK Rx.vi" example files on USRP Examples directory. The ".. Tx.vi" run on one USRP 2920 and "... Rx.vi" run on the another with some parameters IQ sampling rate, frequency, filter, symbol rate, PSK format are same.

 

On "... Tx.vi", the "bit stream type" is "Read from file" and use file "PN_Sequence_09.txt" from "C:\Program Files\National Instruments\LabVIEW 2011\examples\Modulation\FGEN examples".

On "... Rx.vi", the some code with function save output  bit tream from demodulation block to file.

Two USRP2020s are directly connecting by a cable.

 

After that, I found that the data from Rx different with Tx.

 

Could you help me to sovle this problem, please?

 

Best Regards.

 

Luong Tan Phong

0 Kudos
Message 1 of 2
(2,464 Views)

This has already been posted on the USRP board.  To avoid confusion and duplicate information, please refer to the original post:

 

http://forums.ni.com/t5/USRP-Software-Radio/How-to-use-NI-USRP2920-to-modulate-and-demodulate-signal...

Sarah Yost
Senior Product Marketing Manager
0 Kudos
Message 2 of 2
(2,448 Views)