Introduction to Digital Modulation
Binary frequency shift keying (FSK): a(t)=1 ζ(t): ζ(t)=2 π(∆/2)t + φ1 for symbol “1” ζ(t)=-2π(∆/2)t + φ2 for symbol “0” where ∆is the frequency separation between the signals for symbols “1” and “0” respectively, φ1 and φ2 are any constants in [-π,+ π]. The modulated signal is
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