Interactive FSK Mod and Demod Simulator (non-coherent)

Frequency Shift Keying Modulation (FSK)

Carrier Frequency 1 in Hz:

Carrier Frequency 2 in Hz:

Sampling Frequency in Hz:

Bit Rate (bps):

Simulation Workflow & Mathematics

1. Modulation Equations

Let $m(k)$ be the $k$-th bit in the sequence, $f_c$ the carrier frequency, and $A_c$ the amplitude.

FSK (Frequency Shift Keying)

s(t) = A_c · cos(2π f_i t)

*where f_i = f_1 if m(k)=1, and f_i = f_0 if m(k)=0.

Try Other Interactive Online Simulators

🔢ASK, FSK, and PSK

• FSK Modulation & Demodulation (coherent)
• ASK, FSK, and PSK Simulation (Signal Generation)
• Constellation Diagrams Simulation

📻 Analog Modulations

• Amplitude Modulation (AM)
• Frequency Modulation (FM)
• Phase Modulation (PM)

🔢QPSK

• QPSK Signal Genaration (with Simulator)
• QPSK Constellation Simulation

🔢 Continuous Phase Modulations

• MSK (minimum shift keying)
• GMSK (gaussian minimum shift keying)
• BPSK vs MSK (phase comparison)
• BPSK vs MSK vs GMSK (Spectral and Phase comparison)

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