Modulationsindeks
Modulationsindeks, also known as the modulation index, is a dimensionless quantity used in the field of telecommunications and signal processing to describe the depth of modulation of a modulated signal. It is defined as the ratio of the peak amplitude of the modulating signal to the peak amplitude of the carrier signal. The modulation index is a crucial parameter in various modulation schemes, including amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).
In amplitude modulation, the modulation index (m) is given by the formula m = A_m / A_c, where
In frequency modulation, the modulation index (β) is defined as β = Δf / f_m, where Δf is the peak
In phase modulation, the modulation index (β) is similar to that in FM and is given by β =
The modulation index is an important parameter in the design and analysis of communication systems, as it