- #1

kostoglotov

- 234

- 6

I've been getting a lot of problems trying to solve these assignment problems without telling MATLAB to generate insanely too large vectors that exceed memory...

Thing is, under Australian law, LPON transmitters are allocated 85 Mhz to 88 Mhz.

To create a time vector that correctly represents waveforms at those frequencies means creating very dense time vectors. Our monitoring signal is 72 seconds long, and to sample the oscillator correctly during modulation (fm_mod) means trying to create too large a time vector. I could use interp1() to match the less dense message vector to the 8x.x MHz oscillator waveform vector...except of course, not enough memory.

My question is, do we need to adhere to Nyquists Theorem when mixing our oscillator with our message signal during modulation, or can we apply that 2*pi*fc*t to a time vector that contains WAY fewer points than would be needed to properly represent a 8x.x MHz waveform?