Modulation index formula for am

∴ From (i), modulation index, am = = (a+b)/2(a+b)/2 = a+ba−b.

1. What is the modulation index of AM?
2. What is modulation index and its formula?
3. How we calculate modulation index for amplitude modulated wave?

What is the modulation index of AM?

In AM schemes, the modulation index refers to the amplitude ratio of the modulating signal to the carrier signal. With the help of Fast-Fourier-Transforms (FFT), the modulation index can be obtained by measuring the sideband amplitude and the carrier amplitude.

What is modulation index and its formula?

Modulation index is defined as the ratio of the amplitude of the modulating wave to that of the carrier wave. So, μ=Em/Ec.

How we calculate modulation index for amplitude modulated wave?

The formula mu= Am/Ac is first encountered in the envelope detector for demodulation. For perfect demodulation or full recovery of message signal, we must have Ka=1/Ac.