FM MODULATION AND DEMODULATION MODEL USING SIMULINK

Electronics And Telecommunication Engineering

In radio communication, Frequency modulation (FM) is the method of conveying information over a carrier wave by varying its frequency. This method is widely used in telecommunication devices to transmit voice without disturbances. In analog applications, the instantaneous frequency of the carrier is directly proportional to the instantaneous value of the input signal. Digital data can be sent by shifting the carrier's frequency among a set of discrete values, a technique known as frequency-shift keying. FM radio is one of the most prevalent forms of media communication in the world today. As listeners all over the world continue to buy and use FM radios, designers for portable devices such as MP3 players and mobile phones are increasingly including FM radio capability in their products. Understanding the basics of FM radio will assist designers in creating high performance products, be it traditional standalone radios, next-generation, or multi-use devices. FM channels are designed to allow carrier frequencies between 88 and 108MHz, each radio station is assigned 200 KHz, to transmit a stereo audio. The left and right channels (each limited to 15 KHz) are multiplexed into a single baseband signal using amplitude modulation. FM frequency is widely used in telecommunication devices to transmit voice without disturbances.

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