Module 4 — Digital Modulation#

ECE 448 · Module 04

Digital Modulation

From bits to waveforms and back: FSK and PAM, end to end.

Lessons 8–10 · Software Defined Radios · Dr. Neil Rogers

Where This Module Goes

FSK and PAM from the flowgraph up: pulse shaping, matched filtering, and timing recovery, finishing with a link that carries ASCII text.

Learning Objectives

  1. I can describe FSK modulation and implement an FSK transmitter and receiver in GNU Radio.
  2. I can describe PAM theory and identify the pulse-shaping, symbol-rate, and bandwidth trade-offs.
  3. I can apply matched filtering and symbol-timing recovery to a received PAM signal.
  4. I can implement a PAM link that transmits and receives ASCII text end-to-end.