Frequency Shift Keying
Represent 0 and 1 using different frequencies
Real-World Applications
Caller ID, garage door remotes, low-speed industrial telemetry, and early 300bps dial-up modems use FSK. Anti-interference capability is better than ASK. Bluetooth basic version (GFSK) is also a type of FSK.
Experiment Steps
- Frequency Hopping: Observe different frequencies for 0 and 1
- Phase Continuity: CPFSK maintains phase continuity
Simulation Experiment
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Parameters(Real-time)
f0 (for 0)300 Hz
f1 (for 1)600 Hz
Bit Rate100 bps
SNR20 dB
Functions: models.phy.fmModulate()