modulations +ni 5460R

[Vinny ICS]

Hi to all,
i am sreenivasulu.I have started working on NI-5640R LabVIEW card.I have to generate QPSK,GMSK,4-FSK and AM(ISB) modulation with Fc 21.4 Mhz.Plz tell me how i have to start ,any modulation tool kit is ter.if ter tell me how to use it.send is ant URL links or Examples or devoloped VIs.


Plz help



Thanking you in advance.

Sreenivasulu.O

[JerryAL]

Hi Sreenivasulu

National Instruments has the Modulation Toolkit (http://www.ni.com/toolkits/lv_modulation.htm).  All the algorithms are floating point and meant to be run on the computer processor.  LV FPGA code that can run on the IF-RIO’s FPGA requires fixed point algorithms.  NI does not currently have a version of Modulation Toolkit designed for fixed point applications.

There is a website called IPNet (http://zone.ni.com/devzone/cda/tut/p/id/4799#toc2) that has a collection of FPGA IP and examples gathered from the LabVIEW FPGA function palette, internal National Instruments developers, and the LabVIEW FPGA community. You can use this resource to acquire IP that you need for your application, download examples to help learn programming techniques, and explore the depth of IP offered by the LabVIEW FPGA platform. In addition to exploring what is offered here, you can also share your LabVIEW FPGA IP or submit an update to existing IP for the LabVIEW community.

Jerry

[Vinny ICS]

Hi Jerry,
Thanks for your soon reply.
In the modulation tool kit some VI are there for analog and digital modulations.these VI are for only simulation or i can use it for labview card also.
if yes tell me procedure.i am using LabVIEW 8.2 and card NI-5460R(PCI).

Thanking you so much.

Thanks & regards,
Sreenivasulu.O

[philippe_w]

Sreenivasulu,

As Jerry mentioned, the Modulation Toolkit algorithms are designed to run on the HOST processor (your PC, for example) and cannot be used directly on the FPGA on the PCI card. Depending on your application, you may be able to process your data on the host before sending it to the card for generation or after receiving acquired data from the card.

If you need to perform the modulation on the FPGA itself, Jerry suggested a way (IPNet) for you to acquire IP that is designed to run on the FPGA. You can also develop your own IP for the task.

~Philippp

[sree_405]

Hi Philippp Sir,
how can design that IPNet.
please give me some tips(basic infomation),so that i can followe and i'll try to implement that one.

i seen one Driver VI Stream to disk.how it works.can i use this one for my application.


regards
Sreenivasulu

[philippe_w]

Sree,

IPNet is just a website that contains code/examples. Jerry provided the link and a description 2 posts prior to mine in this same thread (his post is dated: 02-13-2008 02:10 PM).

~Philippe

[Nikita]

Hi Sreenivasulu,

Have you done 4-FSK Modulator before?

Best regards,

Nikita

[danisan]

Hi all,

I am working hard on a I/Q demodulator for a simpla ASK in the baseband range of up to 700 kHz. Everything has to be implemented on the FPGA to deliver the date to a digital output. I started to study many of the available examples but found out that almost all processing is done on the host and transferred via DMA, which is not sufficient for my application.
When I achieved some results, using FXP Math Lib to compute the Magnitude from the I/Q inputs, and detecting the signal based on the magnitude (amplitude) I realized that, depending on the measurement setup the interested signal can be completely in the phase of the signal.
Is there any knowlegde, how to build a full I/Q demodulator completely on the FPGA of the IF RIO 5640R?

Thanks for your help,
regards,
daniel

[sree_405]

Hi Kikitha,
i done all digital modulation(only simulations).
now i have to use card.from card output port i have to get signal.
if u have any idea abt this card pla help me.for my application now i am using ni 5640r IQ output example project.
suggets me some tips

Thanks &regards
Sreenivasulu.O

[Nikita]

Hi Sreenivasulu.O

I'm realy didn't understand where would you like to get the sigmal from and where are you going to put it after, some analizer? Have you checked an example ni5640R Analog Input and Output?