Question

What are the two types of angle modulation?

Answer 1

1. Angle modulation is a class of carrier modulation that is used in telecommunications transmission systems.
2. The class comprises frequency modulation and phase modulation and is based on altering the frequency or the phase, respectively, of a carrier signal to encode the message signal.
3. The two types of angle modulation are:
4. Frequency modulation:
   
   1.1 Frequency modulation is a technique or a process of encoding information on a particular signal (analog or digital) by varying the carrier wave frequency in accordance with the frequency of the modulating signal.
   1.2 Frequency modulation is used widely in radio communication and broadcasting.
   1.3 In figure, time is along x-axis. In figure1 modulating signal which has to be transmitted and modulated. In figure2 the carrier signal have certain carrier frequency. In figure3 shows the modulated form of the signal.
5. Phase modulation:
   
   2.1 The modulation of the phase of the input wave takes place to impose it on the carrier wave instead of modulating its amplitude.
   2.2 Amplitude modulation is mostly used in the form of electronic communication.
   2.3 In figure1 modulating signal which has to be transmitted and modulated. In figure2 the carrier signal have certain carrier frequency. In figure3 shows the phase modulated signal.