Question

what is linear and nonlinear modulation

Answer 1

Linear modulations are characterized by a bandwidth amplitude B which is equal to the modulation signal. AM is a linear modulation the modulated and the modulating signal present the same bandwidth amplitude centered respectvely on the carrier frequency and the zero frequency. Furthermore the modulation does not affect the spectral content of the modulating signal: the ratio between two harmonic components of the modulating signal is leaved unchanged by the modulation.

Non linear modulation act as nonlinear system: the bandwidth of the modulated signal is wider and can be alterated in terms of ratio between two spectral components with respect to the modulating signal.

Hope this will help you....... ✌

Answer 2

Answer:

Linear or nonlinear digital modulation techniques are both possible. While the sent signal amplitude is constant for nonlinear approaches, with linear modulation the transmitted signal's amplitude and/or phase varies linearly with the digital modulating signal.

Explanation:

Linear Modulation:

A bandwidth amplitude B equal to the modulation signal characterises linear modulations. AM is a linear modulation, where the carrier frequency and the zero frequency are the respective centres of the modulated and modulating signals' respective bandwidths and amplitudes.

Additionally, the modulation has no impact on the spectral content of the modulating signal because it does not modify the ratio of the modulating signal's two harmonic components.

Non linear Modulation:

The bandwidth of the modulated signal is broader and can be changed in terms of the ratio between two spectral components with regard to the modulating signal when nonlinear modulation is used.