Comparing Baseband and Passband Implementations of m-ary PSK

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Comparing Baseband and Passband Implementations of m-ary PSK

Let's assume your original message signal is: 1, 0, 1, 1, 1, 0, 1, 1, 0, 1.
If you want to modulate it using 4-PSK, then your baseband signal will be:

4-PSK Symbols (Real + jImag)

Symbol 0: -1.00 + j0.00
Symbol 1: -0.00 + j-1.00
Symbol 2: -1.00 + j0.00
Symbol 3: -0.00 + j-1.00
Symbol 4: 0.00 + j1.00

Now, if you want to transmit them through a typical wireless medium, you need to modulate the baseband signal with a carrier frequency (in our case, 50 Hz). The resulting passband signal looks like this

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