Basically there are three types of modulation , frequency modulation, amplitude modulation, and Phase modulation. The basic difference between amplitude and frequency modulation is that in frequency modulation audio signals change frequency of carrier wave while in amplitude modulation audio signals change the amplitude of carrier wave.
Browse also : Modulation and its types. This type of modulation the amplitude of the carrier wave is increased or diminished as the amplitude of the superposing modulating signal increases and decreases. Represents a high-frequency carrier wave of constant amplitude and frequency. Represents a or audio frequency signal of a sine waveform. The result obtained by modulating carrier waves with the modulating wave.
Vibration analysis is a process for measuring and analyzing the levels and patterns of vibration signals or frequencies of machinery in order to detect abnormal vibration events and evaluate the overall health of machines and their components. Vibration analysis is especially useful with rotating machinery, in which exist fault mechanisms that may cause amplitude and frequency modulation abnormalities.
The demodulation process can directly detect these modulation frequencies and is used to recover the information content from the modulated carrier wave. In many telecommunications networks, it is necessary to implement modulation in order for information-bearing signals to be represented by a waveform that can effectively pass through a transmission medium.
This modulated signal is then reverted to the original information-bearing signal via demodulation. Disruption of this transmission may occur if there are abnormalities in the modulated signals. Detecting signal anomalies or abnormal vibration patterns within enormous volumes of data signals is not possible using traditional solutions. So, from the above discussion, we can conclude that the two techniques show their usage in different aspects.
In terms of long-distance transmission and cost amplitude modulation is preferred while in terms of better sound quality and fewer distortions frequency modulation technique is more preferable. Your email address will not be published.
Skip to content. Key Differences Between Amplitude Modulation and Frequency Modulation Amplitude modulation is a technique that was discovered earlier than frequency modulation. However, a signal that is amplitude modulated shows more susceptibility towards noise as compared to frequency modulated signal. The circuitry involved in amplitude modulation is more complex.
However, the circuit complexity is less in case of frequency modulation. The signal that has been amplitude modulated has the ability to get transmitted to a larger distance.
As against, a frequency modulated signal travels comparatively less distance than the amplitude modulated signal. The amplitude modulation technique is cost-effective whereas the frequency modulation technique is expensive. Amplitude and frequency modulation technique also shows a variation on the factor of bandwidth requirement.
As in the case of amplitude modulation, the bandwidth requirement is less than that of frequency modulation. Amplitude modulation can be used for medium or high-frequency ranges i.
Both these methods work to encode and broadcast radio signals, but the way that happens makes the actual difference. To understand how both these modulation process works, let us find out their differences. Back in the s, the concept of broadcasting any audio production through radio waves was discovered, and that is when the AM method was also introduced.
To explain the Amplitude modulation definition, it can be mentioned that, in this modulation technique, depending on the information signal, the amplitude of a carrier varies. Radio broadcast signals under AM use lower carrier frequencies, and thus they can travel long distances, and that is larger than FM. Three types of amplitude modulation can be found -. In case of SSB modulation, between an upper sideband and lower sideband, the amplitude-modulated wave contains either one of two.
Double Sideband-suppressed Carrier Modulation. In the case of DSB-SC modulation, bandwidth remains constant even though the transmitted wave contains only upper and lower sidebands. In the case of VSB modulation, vestige which is a part of the signal is only modulated, including one sideband. The equation of Amplitude Modulation is —. M stands for carrier amplitude.
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