Roll

Es/N0 with roll-off

Es/N0 with roll-off
  1. What is a roll off factor?
  2. What is the roll off factor of an ideal LPF?

What is a roll off factor?

Roll-off is the steepness of a transfer function with frequency, particularly in electrical network analysis, and most especially in connection with filter circuits in the transition between a passband and a stopband.

What is the roll off factor of an ideal LPF?

A better compromise would be a roll off factor somewhere between 0.25 and 0.5 (B and C). Here the impulse response decays relatively quickly with small lobes, requiring a pulse shaping filter with a small number of taps, while still keeping the required bandwidth reasonable.

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