Detection of OOK ■ Choosing the detector Optimum coherent detector Best noise performance More costly Noncoherent detector ▣More error rate ■Less costly ■Trade-off between Cost/Noise Performance
Detection of OOK ◼ Choosing the detector ◼ Optimum coherent detector ◼ Best noise performance ◼ More costly ◼ Noncoherent detector ◼ More error rate ◼ Less costly ◼ Trade-off between ◼ Cost / Noise Performance
BPSK(Binary Phase Shift Keying) Generation Message:m(t) Carrier:Cos(2πft) BPSK output A.Cos(2πft+k,m(t)) -909 Phase shift Message 1 10 Unipolar Modulation Bipolar Modulation BPSK output
BPSK(Binary Phase Shift Keying) ◼ Generation Carrier:Cos(2fc t) Message: m(t) BPSK output AcCos(2fc t+kpm(t)) -90 Phase shift Message 1 0 1 0 1 0 1 Unipolar Modulation Bipolar Modulation BPSK output 1 Tb R =