How do I write the code for a nonlinear system?

I want to put a bitstream into a symbol mapper then through a nonlinear system. However I want to use Matlab rather than simulink.

[Oleg Komarov]

More details about the nonlinear system?

[Carmen]

using a polynomial?

Answer 1

[Oleg Komarov]

Then:

% Create function handle
f = @(x,y,bt) x^2+y^2.*bt;

% Bitstream
bt = randi([0,1],10,1);

% Evaluate at x = 2, y = 3 and bt
f(2,3,bt)

Oleg

[Carmen]

thank you, how do I plot the nonlinearity with the modulated signal?