Digital Modulation Techniques

May 4th, 2015
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In electronics, modulation is the process of varying one or more properties of a high frequency periodic waveform, called the carrier signal, with respect to a modulating signal. This is done in a similar fashion as a musician may modulate a tone (a periodic waveform) from a musical instrument by varying its volume, timing and pitch.

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Digital Modulation TechniquesLOVELY PROFESSIONAL UNIVERSITYTERM PAPERTopic: Digital Modulation TechniquesCourse code: ELE102Course title: Electrical science-IISubmitted to:Submitted by:Subrahmanyam Tanala Sirvishwajeet kumarSec:K1901Roll:B57ContentsINTRODUCTION 1 Aim 2 Analog modulation methods 3 Digital modulation methodso 3.1 Fundamental digital modulation methodso 3.2 Modulator and detector principles of operation o 3.3 List of common digital modulation techniques 4 Digital baseband modulation or line coding 5 Pulse modulation methods 6 Miscellaneous modulation techniques 7 ReferencesINTRODUCTIONIn electronics, modulation is the process of varying one or more properties of a high frequency periodic waveform, called the carrier signal, with respect to a modulating signal. This is done in a similar fashion as a musician may modulate a tone (a periodic waveform) from a musical instrument by varying its volume, timing and pitch. The three key parameters of a periodic waveform are its amplitude ("volume"), its phase ("timing") and its frequency ("pitch"), all of which can be modified in accordance with a low frequency signal to obtain the modulated signal. Typically a high-frequency sinusoid waveform is used as carrier signal, but a square wave pulse train may also occur. AimThe aim of digital modulation is to transfer a digital bit stream over an analog passband channel, for example over the public switched telephone n

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