This question needs to be worked at Matlab.

% TO fundamental period in seconds of the sguare wave % a0 DC component % Range - plotting range for signal, 2x1 vector n vec = [1:N]; % Compute the Fourier series coefficients for a square wave a-k = zeros ( size ( n vec ) ) ; % odd indexed components only have non-zero values a-k ( 1 :2 : end) = 1./(j*n_vec ( 1:2:end ) *Omegao ) ; dt 1/(N*f0*10); t -Range ( 1 ) : dt : Range ( 2 ) ] ; xt = zeros ( size ( t ) ) ; for m = 1: length (n-vec) xt - xt + a_k(m)*exp(j*n_vec (m) *Omega0*t)+conj(a_k(m))*exp (- j*n_vec (m) *Omega0*t); end xt = xt + a0 * ones ( size(t)); figure( ); plot (t,xt) title ([ 'Fourier Approximation for N = ', num2 str (N)]); xlabel ( [ , time, ] ) ; ylabel ( [x(t) , ] ) ; The code above generates the signal for a square wave with a period of 4 with a single period taking the form x(t) -1 2st