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Ideal and Ideal and Practical FiltersPractical Filters

Lecture 6Lecture 6

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DiscussionDiscussion Causal signal starts at t=0 and continues to run towards t-infinity.

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Digital Filters

Advantages

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3.6 Signal Distortion over a Communication Channel3.6 Signal Distortion over a Communication Channel

Effects on TDM &FDM:

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Figure: 3.35 a & b

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Energy Spectral Density (ESD)Energy Spectral Density (ESD)

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Energy Spectral Density (ESD)Energy Spectral Density (ESD)

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See example 3.21 yourself

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Energy of Modulated SignalsEnergy of Modulated Signals

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LTIH(t); H(w)

g(t)

G(w)

y(t)

Y(w)

Linear Time Invariant System

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Power Spectral densityPower Spectral density

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Signal Power Is Its Mean SquareSignal Power Is Its Mean Square

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Interpretation of PSDInterpretation of PSD

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Home AssignmentsHome Assignments

Solve the following Problems from the exercise:

• 3.1-1, 3.1-2, 3.1-3, 3.1-4, 3.1-5• 3.2-2, 3.2-3, 3.2-3, 3.2-5, • 3.3-1, 3.3-2, 3.3-3, 3.3-4, 3.3-5, 3.3-7• 3.4-1