Week 01
Digital Communication System Model
I use the saved course file to reconnect sampling, baseband transmission, digital modulation, and error-rate analysis.
What I connect in this unit
An information source produces bits, and the transmitter maps them to baseband pulses or a passband waveform suited to the channel. The receiver estimates bits after noise and distortion, with error rate, bandwidth, and power efficiency as performance measures.
Concept map
- Source and channel
- Transmitter and receiver
- Baseband and passband
- Performance measures
Technical anchor
A complex baseband signal x(t) becomes the passband waveform s(t) = Re{x(t)e^(j2πfct)} at carrier frequency fc.
How I review it
Draw source coding, modulation, channel, demodulation, and decision in order, labeling each interface as bits, samples, or a continuous waveform.
Connection to the full course
Unit 1 of 12. Unit numbers expand topics from the saved file into a concept sequence, not an attendance-week record.