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The third method of modulation is Phase Modulation (PM) - very similar in some respects to Frequency Modulation (FM) - It is not used in radio transmission, providing little benefit over FM but requiring a much more complex receiving device.
PM modulates the phase relative to the signal. The mathematics is horrific and it has been nearly 40 years since I had anything to do with it and that was only as an apprentice.
Wikipedia
does have a reasonably good description of PM
Wiki User
∙ 11y ago
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What are two essential components of a modulated wave?
amplitudefrequencyphase
What is continuous wave power?
In communications, a continuous frequency voltage or electromagnetic wave capable of being modulated or impressed with a second signal which carries the information to is transmitted.
Why analog data have to be modulated onto an analog signal?
For transmission through a radiowave.
Determine second third and 12TH harmonic of a sine wave?
A sine wave has no harmonics. It only has a fundamental, so the value of the 2nd, 3rd, and 12th harmonics of a sine wave is zero.
What is the relation between carrier frequency and modulating signal?
If the modulating system is AM (Amplitude Modulation) then the amplitude of the carrier wave changes with the amplitude of the modulation. On a specrum analyser that shows up as frequency sidebands. If the frequency of the carrier waves depends on the amplitude of the modulating signal that is called FM (frequency modulation). On a spectrum analyser that shows up as sidebands also.
What are two essential components of a modulated wave?
amplitudefrequencyphase
What is demodulation in communication?
recovering the information content from modulated carrier wave
What parameter of a sine wave carrier can be modulated?
Amplitude, Frequency and Phase
What characteristic two modulated signals are guaranteed to differ in wavelength division multiplexing?
color
In wavelength division multiplexing two modulated signals are guaranteed to differ in what characteristic?
Color
What do you understand by modulation?
Modulation is a word applied to anything that varies in level. Brake pads are modulated in an anti lock braking system. The human voice can be modulated whilst singing to give a pleasing sound An audio signal can be superimposed upon a carrier wave in broadcasting. The carrier wave is amplitude modulated by the audio signal.
What is difference between modulated wave and carrier wave?
Carrier Wave: A carrier wave is a high-frequency electromagnetic wave that is used as the "carrier" or the base signal in a modulation process. It is typically a pure sine wave with a constant frequency and amplitude. The carrier wave by itself does not carry any information; it serves as a vehicle to carry the information from one location to another. In AM and FM radio broadcasting, the carrier wave is the primary signal transmitted by the radio station. Modulated Wave: A modulated wave is the result of combining the carrier wave with an information signal, such as an audio signal or data. Modulation is the process of varying the characteristics of the carrier wave (either its amplitude or frequency) in accordance with the information signal. There are two common types of modulation: Amplitude Modulation (AM) and Frequency Modulation (FM). In AM, the amplitude of the carrier wave is varied in proportion to the amplitude of the information signal. This variation encodes the information onto the carrier wave. In FM, the frequency of the carrier wave is varied in proportion to the amplitude of the information signal. This variation encodes the information onto the carrier wave. The modulated wave contains the information that needs to be transmitted, and it can be demodulated at the receiving end to retrieve the original information.
Why the voltage signals created by microphone are modulated before tranmitting them throgh radio waves?
The signal from the microphone isn't modulated. The radio wave is modulatedwith the microphone signal. 'Modulation' just means the process of addinginformation to the bare radio wave.
What is the meaning of modulated wave?
Modulation is where an electronic signal (base) is combined with another electronic signal (carrier).The base could be audio, video or digital. The carrier is the frequency that a receiver (radio or television) is tuned to.The modulated wave is the result of this combination.
What is continuous wave?
In communications, a continuous frequency voltage or electromagnetic wave capable of being modulated or impressed with a second signal which carries the information to is transmitted.
What is continuous wave power?
In communications, a continuous frequency voltage or electromagnetic wave capable of being modulated or impressed with a second signal which carries the information to is transmitted.
Which wave characteristic is most related to sound wave intensity?
Amplitude (the height of the wave)
