How to make a FM radio transmitter using Labview and USRP2920??

[chahatb]

I am new to labview and USRP and I am trying to explore my new USRP2920. I have been able to work out an example of fm receiver but I now want to make a radio station of my own..Can any1 help plzzz

[TuiTui]

Hi chahatb,

There is a few example of FM transmitter on NI website. You may want to have a look on those. Some of the example can be found as below,

https://decibel.ni.com/content/docs/DOC-24206

https://decibel.ni.com/content/docs/DOC-25893

There also examples on transmitting signal using USRP that are shipped with USRP which can be found as below

C:\Program Files (x86)\National Instruments\LabVIEW 2013\examples\instr\niUSRP\

TuiTui

[chahatb]

Hi TuiTui,

Thanks for the help but earlier also I went through this example and the problem I found was that it is not transmitting any audible sound. Also do you have any idea how to convert a song into transmittable form???

[TuiTui]

Hi chahatb,

That's weird I was able to run the VI from this link and hear the sound from a sound file, https://decibel.ni.com/content/docs/DOC-25893

The question would be how you receive the sound waveform? What is the song file you use to transmit? I would suggest you to try .wav file as i use this file format and it works.

Also make sure that the signal is not interfered by radio frequency from radio station. 

Best regards,

TuiTui

[chahatb]

Thanks!! It works.

Can you advice some texts I need to go through to understand that .vi and to be able to make one of my own?

[chahatb]

Hello TuiTui,

Is it possible to transfer live recording from microphone with modifications to above vi??or if u can sugges some new vi..I am trying to make a mini radio channel of my own

[TuiTui]

Hi chahatb,

Yes you can do it with your microphone. You can search through an example called "continuous sound input.vi" from example finder (Help->Find examples...).

you then can combine the two VIs together.

For the text explaination of the previous VI, i would say that it read a waveform from a .wav file, resample the waveform, and FM modulate the signal.

I will leave theory for you as i believe you can search those information on the internet.

TuiTui

[chahatb]

Hi TuiTui,

I tried combining the two but it wasn't working. Please help.

[TuiTui]

Hi chahatb,

You might need to show me how you combine the two. If possible, please capture a screenshot or post a VI.

Best regards,

TuiTui