PSK simulation exercise

[Serina]

Hi everyone,

                    anyone knows how to modify this simulation exercise to show PSK modulation and constellation diagram? Thanks!

[hoffiz]

Hi,

It seems that you have the Modulation Toolkit and they are a couple of examples that already show how to simulate the PSK modulation and they also show the constellation. Take a look at the functions used in: “MT Shifted PSK demodulation.vi” and “MT PSK BER vs EbN0 graph [Reed-Solomon coding].vi” and let me know if they help.

Also as further reference you can take a look at these tutorials and knowledge bases: Digital Modulation Fundamentals, Modulation Toolkit Shipping Examples and OQPSK.

[Serina]

Hi,

    Thanks for your reply. But those link u have attached i had look into it before. But it is not what i want, actually my exercise is download from NI tutorial. But it only runs Constellation Diagram but i need modulation too..My project supervisor mentioned she need modulation instead demodulation. I have downloaded the hardware exercise of Phase Shift Keying modulation for reference but the equipment or VIs needed i did not have. That's why i trying to modify the exercise instead to show modulation and constellation diagram.

[hoffiz]

Hi,

Do you have the modulation toolkit? Are you trying to simulate a modulation or a demodulation? In the code you attached you are demodulating the signal, what I’m guessing is that you are looking to see the waveform as time versus amplitude and be able to see the change in frequency, right? If that is the case let me know if the attach example helps.

[Serina]

Hi Jaime,

              Yes i am trying to obtain a graph with time versus amplitude, i have no idea it is a demodulation i just downloaded from the NI tutorial Thanks for telling me. I tried to install my modulation toolkit 4.0 yesterday but there is error. I cant open your file it pop out a window the file is a later version of file LabView8.5 then your current version 8.2.1. I had posted a question asking about the process of downloading the modulation toolkit. http://forums.ni.com/ni/board/message?board.id=170&thread.id=321660 Please take a look, i really don't know what to do now?

Message Edited by Serina on 05-08-2008 09:02 AM

[Serina]

I have no idea did i accidentally deleted some important folders or files? I opened my exercises and occurred the same error.

[hoffiz]

Hi.

Here is a copy of you attached exercise. The problem is that I created the example in LabVIEW 8.5 not 8.2.1. Attach is a screenshot of what you should be doing in case the same attach code in 8.2 does not opens.

I hope it helps


Message Edited by Jaime F on 05-08-2008 03:00 PM

[Serina]

Hi,

              I want to ask, when i installed the modulation toolkit what should i click and the instruction for installing the toolkit? It is because when i click on LabView 8.2 features it cant installed, when i click uninstall one of the version it will then switch to the next window to continue. Is this the way to install the toolkit which means that user have to select one features to delete then it will start to install others and deleting the features user selected sitmultaneously? Actually i cant even open my own exercises for now. Many VIs have disappear for example PN order (MT Generate Bits poly).vi, MT generate system parameters.vi and etc.Does these vis belong to modulation toolkit? The previous message u mention that if i can run the PSK modulation from the tutorial means that i already have the toolkit is that true? It is because my supervisor mention i dont have that's why she ask me to download again and i dont know why many errors occurred now.

[hoffiz]

Hi,

Just remember that the Modulation Toolkit is not a free tutorial. It is a tool kit you have to purchase to enhance LabVIEW capabilities. It sound like you use to have it or did have it. “NI Modulation Toolkit”. I do not know what have you done but it seems the issue you are running to can be fix by uninstalling, the Modulation Toolkit and reinstalling it again.  If you can open LabVIEW and search on your functions palette modulation functions then the toolkit is installed.  

I took a look at your other discussion forum, the one answered by ChrisD, I really don’t know where have you lost track of you programs. The version you have of LabVIEW should match the modulation toolkit support when you install it. If you want to take the time you can reinstall LabVIEW and the install the toolkit. What versions of LabVIEW do you have?

I hope it helps

[Serina]

Hi,

    Thanks for replying i have solved the problems i had seek help from my supervisor she said there are maybe some error occurred when i installed again at the very 1st time. Because we have no idea the modulation toolkit was already installed. I have uninstalled all the software and reinstalled again. Now LabVIEW function normally.