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Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal.
Phase is mea- sured from a zero crossing, as illustrated by plotting the phase angle as the radius vector rotates at a constant angular rate determined by the frequency. The ideal (perfect) sine-wave-related parameters are as follows: vO, average (nominal) frequency of the signal; v(c), instantaneous frequency of a signal
Amplitude modulation (AM) is a technique used to encode information in a carrier wave by varying its amplitude while keeping the frequency constant.
Frequency spectrum of an amplitude modulated wave. Different components of the modulated wave may be represented by plotting their magnitudes as shown in Fig. 2 which gives the frequency spectrum of amplitude modulated wave for a single modulating frequency f m .
Amplitude Modulation (AM) is a technique used to encode information in a carrier wave by varying its amplitude while keeping the frequency constant. This method is widely used in communication systems, particularly for radio broadcasting, where audio signals are transmitted over long distances.
The use of amplitude modulation to change the frequency content of a message from its baseband frequencies to higher frequencies makes the transmission of the message over the airwaves possible. Let us explore why it is necessary to use AM to transmit a music or a speech signal.
Amplitude Modulation (AM) is a method of varying the strength or amplitude of a carrier wave in accordance with the information signal being sent, such as audio or data. This technique was crucial in the development of radio communication, allowing sound to be transmitted over long distances by altering the amplitude of the radio waves.
