generate QPSK signal as input

I want to give an input signal as QPSK ...Let it be S

And take the idft for the same..let it be X

S varies from S(0) to S(Nt-1)

X varies from X(0) to X(Nt-1)

This is MIMO ofdm project..how can i implement this?

Nt=2 (number of transmit antennas)

My project goes like this:

Give QPSK(S0,S1) as input signal; Take IDFT of QPSK to get X0,X1=X;

Add CP(cyclic Prefix) = 15;

We will get channel response h0,h1=H (Note: I have got channel response)

Then Remove CP and take DFT to get Received signal=HX

Pass it to FEQ to get S0^ and S1^

I wanted to know how should I give QPSK and take IDFT for the same

[Janet]

http://www.scribd.com/doc/48495968/My-Base-Paper