Lec 5 - Signals, Filters, Electronic Oscillators, Frequency Mixers, Audio Com., AM/FM Modulation
ENGI-28779 - Communication Systems (Sheridan, Toronto)
Outline:
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0:00:00 - Introduction
0:01:42 - Spectrum of Aperiodic Signals (Fourier Series vs. Transform)
0:07:54 - Signal Processing Filters
0:09:42 - Filtering a Square Wave Signal
0:20:24 - Filtering a Sawtooth Signal
0:25:09 - RC Low Pass Filter
0:27:26 - Frequency Mixers
0:31:59 - Electronic Oscillators
0:34:47 - Upconversion vs. Downconversion
0:45:14 - Amplitude Modulation
0:47:08 - Why Modulate a Signal?
0:50:50 - Frequency/Bandwidth of AM and FM Signals
1:00:14 - Frequency Spectrum of Human Voice
1:06:49 - Type of Analog Modulation Schemes (AM, FM, PM)
1:10:58 - Single Tone AM Modulation
1:19:53 - AM Signal in Time Domain
1:24:35 - AM Signal in Frequency Domain
1:32:05 - Numerical Example: Spectrum of AM Signal
1:44:27 - Envelope of AM Signal
1:49:14 - Modulation Index
1:57:56 - Assessing Modulation Index with an Oscilloscope
2:07:11 - Power of AM Signal
2:15:58 - Numerical Example: Power of AM Signal
2:26:33 - Different AM modulation Schemes
2:36:14 - AM Demodulator
Related Lectures:
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Lec. 1 (Welcome to Communication Systems): • Lec 1 - Welcome to Communication Systems
Lec. 2 & 3 (System Design, Time/Frequency): • Lec 2 and 3 - System Design, Signal Proper...
Lec. 4 (Fourier Series Analysis): • Lec 4 - Fourier Series Analysis, Square Wa...
Lec. 5 (Filters, Oscillators, Mixers, Modulators): • Lec 5 - Signals, Filters, Electronic Oscil...