Nct 362 Learning Team

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Advantages and Disadvantages of AM, FM, PM, and QAM There are several forms of modulating signals and each form have advantages and disadvantages. There are amplitude modulation, frequency modulation, phase modulation, and Quadrature Amplitude Modulation. While some have better qualities than others, each form of signal modulation has a purpose. Amplitude Modulation Amplitude modulation, also known as AM, is the oldest form of modulation and is usually used for broadcasting radio transmissions and the use of two-way radios. Some of the benefits of amplitude modulation are that it is simple to implement, it takes few components to demodulate it while using a circuit, and receivers are cheap to purchase and to use. The receivers do not need any specialized components to operate. There are some disadvantages of using amplitude modulation as well. They consist of higher power usage, often considered very inefficient. The bandwidth needed to transmit is double for the highest audio frequency. And, there are high amounts of noise due to the amplification each time the modulation is amplified. Frequency Modulation Frequency Modulation, also known as FM, also has advantages and disadvantages. Some of the advantages of frequency modulation are that it is resilient to noise, resilient to changes in signal strength, the modulation does not need to be amplify by linear, and the levels for transmission will be higher even without amplification. The disadvantages of frequency modulation are that the components to demodulate are much more expensive and complicated, some modes have higher data spectral efficiency, and there could be some distortion because the sidebands extend to each side infinitely. Phase Modulation Phase modulation is related to frequency modulation except the advantage to phase modulation is that it has less interference from static and the

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