Module 3 — Analog Modulation#

ECE 448 · Module 03

Analog Modulation

AM and FM: build them, receive them, and hear the difference.

Lessons 6–7 · Software Defined Radios · Dr. Neil Rogers

Where This Module Goes

Simulate AM, then build AM and FM receivers in GNU Radio and pull a live broadcast station, RDS data included, off the air.

Learning Objectives

  1. I can describe DSB-AM, DSB-SC, and SSB and identify each on a spectrum.
  2. I can implement an AM modulator and demodulator in GNU Radio and verify demodulated audio against the source.
  3. I can implement an FM receiver in GNU Radio, demodulate a live broadcast FM signal, and decode its RDS data.
  4. I can explain and demonstrate the trade-off between bandwidth and noise performance for AM vs. FM.