Lab03-eces352 - Intro Two types of modulation will be reviewed in this module Amplitude modulation consists encoding information onto a carrier

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Intro Two types of modulation will be reviewed in this module. ? Amplitude modulation consists encoding information onto a carrier signal by varying the amplitude of the carrier. ? Frequency modulation consists of encoding information onto a carrier signal by varying the frequency of the carrier. There are two primary ways of viewing any type of a wave; in the time domain, or in the frequency domain.The most common representation of signals and waveforms is in the time domain. However, most signal analysis techniques work only in the frequency domain Signals can be transformed between the time and the frequency domain through various Transforms such as the impulse response. The most important process translation between the time and frequency domain is the convolution. Beat notes are produced by adding two signals with nearly identical frequencies x(t) = Acos(2Pi*ft) + B cos(2pi*f2*t) (1) Beat notes also provise an interesting way to invertigate the time frequency characteristic of spectrograms. A specctrogram estimates the frequency content over short section of the signal. With the short section of the signal, the amount of input data is limted; then it does not show an
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This note was uploaded on 03/14/2012 for the course ELECTRICAL ECEL taught by Professor Yh during the Spring '12 term at Drexel.

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Lab03-eces352 - Intro Two types of modulation will be reviewed in this module Amplitude modulation consists encoding information onto a carrier

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