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Chapter: Digital Communication - Digital Modulation Scheme

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Power Spectrum or BPSK Modulated Signal

Continuing with our simplifying assumption of zero initial phase of the carrier and with no pulse shaping filtering,.

Power Spectrum or BPSK Modulated Signal

Continuing with our simplifying assumption of zero initial phase of the carrier and with no pulse shaping filtering, we can express a BPSK modulated signal as:


Now, the power spectrum S(f) of the modulated signal can be expressed in terms of UB(f) as:





Fig.5.24.4 shows the normalized base band power spectrum of BPSK modulated signal. The spectrum remains the same for arbitrary non-zero initial phase of carrier oscillator.


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