How can I increase signal bandwith in Adjacent and Co-Channel Interference example?

Hello all,

I am using the Mathwork example for Co'channel interference, however, I would like to increase the bandwidth of my transmitted signal, I see that the example is making use of a Bernoulli binary generator, where I cannot specify my sigal bandwith,thus I was wondering how is the easiest way to generate a signal of 10MHz or 20MHz.

Thanks in advance,

Regards,