Week 05
Pulse Shaping and PAM
I use the saved course file to reconnect sampling, baseband transmission, digital modulation, and error-rate analysis.
What I connect in this unit
PAM selects an amplitude for each symbol and places a symbol pulse in time. A raised-cosine filter preserves zero crossings at symbol instants while its roll-off factor trades excess bandwidth against time-domain tail length.
Concept map
- Symbol pulses
- Raised-cosine filters
- Roll-off factor
- Bandwidth
Technical anchor
For symbol rate Rs and roll-off α, the one-sided raised-cosine baseband bandwidth is B = Rs(1 + α)/2.
How I review it
At the same Rs, calculate bandwidth for α = 0, 0.5, and 1, then compare pulse sidelobes and zero-crossing locations.
Connection to the full course
Unit 5 of 12. Unit numbers expand topics from the saved file into a concept sequence, not an attendance-week record.