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lecture3 - EEE455/591 EEE455/591 Basic of Analog Modulation...

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EEE455/591 EEE455/591 Basic of Analog Modulation Basic of Analog Modulation Reading: Textbook Sections 3.1, 3.2.1 Reading: Textbook Sections 3.1, 3.2.1 Review: Some more Fourier analysis Review: Some more Fourier analysis Topics: Topics: Amplitude Modulation, time domain Amplitude Modulation, time domain Amplitude Modulation, frequency domain Amplitude Modulation, frequency domain Mathematical Basics of AM Modulation Mathematical Basics of AM Modulation Double Side Band Modulation. Example Double Side Band Modulation. Example
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Review: Fourier Transform abcde Rectangular function -> sinc function t f 1 or A 1/2 or T/2 fT fT AT π sin t T 0 T Periodic rectangular function -> Sampled sinc function -1/2 or -T/2 1
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Review: Fourier Transform Rectangular function -> sinc function f fT fT AT π sin Sampled rectangular function -> Periodic sinc function t 1 or A 1/2 or T/2 -1/2 or -T/2 t 1 or A 1/2 or T/2 -1/2 or -T/2 t 0 1/t 0 f
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1. Amplitude Modulation – Time Domain abcde Transducer produces a signal m(t) e.g. an electrical signal representing speech through a carbon microphone. The electrical signal transmitted over a copper wire
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lecture3 - EEE455/591 EEE455/591 Basic of Analog Modulation...

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