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Modelling BPSK etc from a DDS architecture?

  • 11-03-2010 03:16PM
    #1
    wexic0
    Registered Users, Registered Users 2 Posts: 22 ✭


    I am trying to adjust the basic direct digital synthesis model I have coded to display ASK etc but I dont no where to start. I assume ASK can be shown using a random number generater based on the values of 0 or 1.
    This is the code I have came up with

    r = 1024;
    fsw = 8;
    latch = 0;
    j = zeros(256);
    n1 = 0:1:r;
    n2 = 1:256;

    rom = cos(2*pi*n1/r);

    for i = 1:256, latch = latch + fsw;
    while latch >= r, latch = (latch - r) + 1;
    end
    j(i) = rom(latch);
    end

    %x = fft2(j);
    plot(n2,j);

    Does anyone have any ideas?
    Please dont point me to google!
    Tagged:


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