Chapter_8_AM_FM_Modulation - Types of Modulation (AM, FM,...

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ICT Technologies Page 21 of 87 pages. Chapter: 4: Module 3: Modulation and Multiplexing Types of Modulation Amplitude Modulation (AM) In Amplitude modulation (AM), the information signal is mixed with the carrier signal in such a way as to cause the AMPLITUDE of the carrier to vary at the frequency of the information signal. Figure 6: Amplitude Modulation Frequency Modulation (FM) With frequency modulation, the modulating signal and the carrier are combined in such a way that Page 1 of 3 Types of Modulation (AM, FM, PM) 06.11.2007 http://cbdd.wsu.edu/kewlcontent/cdoutput/TR502/page21.htm
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causes the carrier FREQUENCY(fc) to vary above and below its normal(idling) frequency. The amplitude of the carrier remains constant as shown in figure below. Figure 7: Frequency Modulation As the voltage of the modulating signal increases in the positive direction from A to B, the frequency of the carrier is increased in proportion to the to the modulating voltage. As the voltage reduces from B to C, the frequency of the carrier decreases until it is back to the original value at C. the modulating
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This note was uploaded on 12/04/2011 for the course MATHEMATIC 965869 taught by Professor Metinüke during the Spring '11 term at Istanbul Bilgi University.

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Chapter_8_AM_FM_Modulation - Types of Modulation (AM, FM,...

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