Will someone please explain to me why higher data rates require greater bandwidth, if the modulation remains the same? I understand nyquist theorem and whatnot is involved, but I've been unable to wrap my head around it. To me if you are using a digital modulation scheme, then you use a single, discreet frequency, and key it (on/off) with your data, at a speed determined by your desired data rate. But the bandwidth actually broadens with the data rate.
Thank you
Thank you