Amplitude Modulation Matlab/SIMULINK скачать в хорошем качестве

Amplitude Modulation Matlab/SIMULINK

Amplitude modulation (AM) is a method of transmitting information by varying the amplitude of a carrier wave in proportion to the message signal being transmitted. The carrier wave is a high-frequency signal modulated (changed) amplitude by the low-frequency message signal. The process of amplitude modulation involves the following steps: Message signal: The message signal is the audio signal that needs to be transmitted. It is usually a low-frequency signal that carries the information to be shared, such as speech or music. Carrier signal: The carrier signal is a high-frequency signal generated by an oscillator. The frequency of the carrier signal is typically several times higher than the message signals. Modulation: In the modulation process, the amplitude of the carrier wave is varied in proportion to the amplitude of the message signal. This is achieved by multiplying the carrier signal with the message signal using a modulator circuit. Amplification: The modulated signal is then amplified to a suitable level for transmission. Transmission: The amplified signal is transmitted through an antenna or cable. Demodulation: The modulated signal is demodulated at the receiver end to recover the original message signal. This is achieved by multiplying the modulated signal with a replica of the carrier signal, which results in the recovery of the original message signal. The amplitude modulation technique is widely used in radio communication systems for transmitting audio signals over long distances. It is also used in some forms of digital communication systems, such as quadrature amplitude modulation (QAM), where the amplitude of the carrier wave is varied to represent digital information.