How to generate N band limited signals in Matlab each time signal being unique (NOT BY TOGGLING Freq)

I tried the following code for frequency toggling

function [X,w] = generate_signal(N)

X = cell(1,N);

rng('shuffle');

w = randi([1,10],1,N);

for k = 1:length(w)

X{k} = @(t)((sin(w(k).*t) + sinc(w(k).*t) + cos(w(k).*t))./max(sin(w(k).*t) + sinc(w(k).*t) + cos(w(k).*t)));

end

end

Is there any way to ensure all signals are unique. Toggling amplitude would be useless since, it is normlised.