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RF Record and Playback with USRP and LabVIEW Communications

Overview

This example demonstrates RF record and playback using the NI USRP™ tranceiver.

Description

For complete description and details for the following example, check out this white paper:

http://www.ni.com/white-paper/13881/en/

Steps to Implement or Execute Code:

1.  Open Record.gvi and navigate to the front panel

2.  Populate the front panel controls as follows:

  • Configure a file path for the recorded signal
  • Enter the IP address of your USRP device (typically 192.168.10.2)
  • Set the Carrier Frequency, IQ Rate, and Gain for the signal you'd like to acquire
  • Ensure the proper antenna is selected

3.  Run the VI to record a signal with the configured settings

In our demonstration using a handheld two-way radio,  the parameters were configured and input was observed/recorded as shown in Figure 1:

record - front panel.PNG

Figure 1: Front panel parameters for recording of two-way radio


NOTE: Be sure to observe the coerced values so that you know exactly what parameters were used for the recording

4.  Open Playback.gvi and navigate to the front panel

5.  Populate the front panel controls with the File Path to the previously recorded binary file, as well as the Carrier Frequency, IQ Rate, and Gain used previously (assuming you're playing back to the same device you recorded from)

6.  Run the VI to playback the recorded signal with the configured settings

The parameters were configured as shown in Figure 2 for playback of the two-way radio signal recorded for this demonstration:

playback - front panel.PNG

Figure 2: Front panel parameters for playback of recorded two-way radio signal

Requirements

Software

  • LabVIEW Communications System Design Software 1.0+

Hardware

  • USRP-292x, USRP-293x, USRP-294x, or USRP-295x
  • Device to generate RF signal you wish to record and playback (like a two-way radio)

Additional Images or Video

See the full Record and Playback tutorial for LabVIEW 2014: http://zone.ni.com/devzone/cda/tut/p/id/13881

LabVIEW 2014 version of this example is available here.

Click Here to discuss this and other examples on the LabVIEW Communications Discussion Forums.

National Instruments
Comments
singh8865
Member
Member
on

hello 

can I use the RF Record-Playback Communications.zip ‏23 KB for monitoring if gsm signal in GSM 900 band to find the channel efficiency...???? please help...

 

if not can You provide gsm signal receiving vi ...........in labview using usrp2920 kit.. 

srnagar
Member
Member
on

hi

I am using labview 2017 and the above rf record playback .zip , iam not able open in labview 2017 in windows platform ,

 

please suggest how to open that files in labview 2017.

 

regards

Ekula srinivas

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