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Binary Phase Shift Keying (BPSK) & Quadri Phase Shift Keying (QPSK). Binary Phase Shift Keying (BPSK). The BPSK signal is generated as: The transmitted signals are:  . Illustration of BPSK. Note: Bits 1 and 0 have the same amplitude and frequency but they differ in phase.
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Binary Phase Shift Keying (BPSK)&Quadri Phase Shift Keying (QPSK)


Note: Bits 1 and 0 have the same amplitude and frequency but they differ in phase.
Note : The spectrum of the binary BSK resembles
that of double sideband suppressed carrier modulation.
Signal space representation
 si(t) can be expressed as:
decisionmaking process.