receiving MSK signal - special scenario

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BMWE

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Hello,

I want to simulate the following situation:
I transmit data in 2K, encode it with turbo code (1/2).
Then I expand the data in the following way: each coded bit is repeated some number of times. Let say I have A=[1 0 0 1 0] and the repeat factor is 4, then I'd receive B=[1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0].
This B sequence I modulate using MSK.
So the Rin=2K, Rcoded=4K, RMSK

Now in the receiver side, I want that out of the MSK receiver will have rate of RMSKreceiver=4K (i.e it will execute also the shrink of the data rate). I can't execute the shrink separately.
Then I have turbo decoder and the output of the bits.

Can somebody please assist me with the MSK receiver?
 

hello! as you know, shaping of MSK is

To demodulation MSK you must separate ai and aq components.
you can devide signal into 2 s(t).


then using a filter to remove high frequence, you 'll receive ai*cos(pi*t/2T) and aq*sin(pi*t/2T).
i don't write english well, but i hope you can understand i write
have fun
 

Hi

It is still didn't response to my question
 
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    bangbi

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