PSK MOD DEMO

[alexpas]

Hi all,

I want to implement a simple communication chain in Labview Communications using PSK modulation and matched filtering. I know that during that due to filtering as said in Details of MT PSK Modulation. So I used a little padding of zeros as we did in standard Labview.

However i this seems not to work or be sufficient in Labview Communications. My input and output streams are totally different (BER=1).

There's a lack in simple examples concernig LabVieW Communications and I get really desperate.

Any ideas/suggestions ?

[tcap · Accepted solution]

Hey,

I created an example that does PSK Modulation and Demodulation. Please take a look at the attached VI.  The issue I faced while creating this example was configuring the message sync bits. This caused my BER to equal 1, because it never detected a message.

Regards,

[alexpas]

Thanks Thomas,

I think this should be a sticky or something for people that want to implement a basic communication chain.

[tcap]

Hey Alexpas,

I am going to try and make this into a community example and lobby to get it added directly in LabVIEW Communciations.

Regards,

[emnajaoua]

hello,

 I have almost the same problem as the 1 st message.I am trying to modulate a signal then transmit it but the constellation that appears to me is not the one I am searching.

Here are the pictures from my VI.

Could anyone help me with that ?

[emnajaoua]

I have tried the solution proposed but it didn t work in my case.

Thanks in advance.

[Ben_Co]

Hi emnajaoua,

Could you post the constellation you're seeing? Also, what PSK scheme are you trying to create? Finally, could you attach the VI itself to the forum so we can try running it? 

Thanks,

BeenCoughin

[emnajaoua]

Hi BeenCoughin,

I have fixed the problem.Here you can find my final VI.I have made separetly the modulation and demodulation for the purpose of my project.

Thanks.

[xfx5636]

HI EMNAJAOUA,I’m a beginner who is  learning labview.recently i'm stduying psk and want to  calculate BER,when i use the MT Calculate BER,the ber equal to 1.i found that you ave solved this problem but i just can not open your VI beacuse your vi's type is .gvi.can you resend your vi please?

[AgentAstronaut]

Hi xfx5636,

.gvi code is the code type for LabVIEW Communications. While there is a tool that can convert vi to gvi there is not a tool to do it the other way. As a result there is no way to resend the code as a VI.

Cheers,

Michael