AM Signal Bandwidth (Tone Modulation) (BW_AM ≈ 2 f_m)
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BW_AM ≈ 2 f_m
What each symbol means
| Symbol | What it stands for |
|---|---|
| f_m | Highest frequency component in the message (Hz) for a single-tone or effective message bandwidth |
| BW_AM | Bandwidth of the AM signal (Hz) — width of occupied spectrum around carrier |
When to use this
Double-sideband AM with carrier; message band-limited to f_m. For single tone cos(2πf_m t), sidebands at f_c ± f_m.