modulating qpsk

[nauman2558]

sir i am trying to do psk modulation but the inbuilt blocks in labview just give me symbols i have to multiply the real part with cos(omega) and sine(omega) as shown in the attatched png. i couldn't find a specified block for this in modulation toolkit. so i tried to do it manually, i am sending png, plz tell me is it right?

SPSK (t) = Ac cos (2πƒct + Ɵm )------------ sir MT MODUALTE PSK just gives out Ɵm while it doesn't give this 2πƒct term in output. i have to apply all of this equation.

[nauman2558]

sir i am sending u qpsk modulator and demodulator block diagrams which i have to implement.

[nauman2558]

sir i am really stuck with this problem, looking forward to your response....

regards

[danil33]

If you attach your VI then it will be helpful to others to help you.So please attach what you have done so far!

[nauman2558]

sir i have attatched my vi. plz have a look at it i have passed my data from two types of low pass filters, but i think the results are same.  What should i do now to get my transmitted bits again?

[nauman2558]

sir i have cleaned up my .vi . so that it can be understood easily. plz sir have a look at it and tell me that can i use PLL for phase detection at the receiver end then afterwards can i be able to get my transmitted bits back from the detected phases?

[nauman2558]

sir i am again attatching my vi without triple display. so that most can see it.