Question

A diagram of a BPSK modulator is shown. If the line code has amplitudes ±5V and pulse width $T_b$, derive the power spectral density first at baseband then at the modulator output. If the power spectral density of a QPSK signal is the equivalent to adding two of these uncorrelated and orthogonal BPSK spectrums, what is the power spectral density of this QPSK? (Show all steps and reasons) NRZ-L Data $\cos(\omega_c t)$ $s(t)$

          A diagram of a BPSK modulator is shown. If the line code has amplitudes ±5V and pulse width $T_b$, derive the power spectral density first at baseband then at the modulator output. If the power spectral density of a QPSK signal is the equivalent to adding two of these uncorrelated and orthogonal BPSK spectrums, what is the power spectral density of this QPSK? (Show all steps and reasons)
NRZ-L Data
$\cos(\omega_c t)$
$s(t)$

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A diagram of a BPSK modulator is shown. If the line code has amplitudes ±5V and pulse width Tb, derive the power spectral density first at baseband then at the modulator output. If the power spectral density of a QPSK signal is the equivalent to adding two of these uncorrelated and orthogonal BPSK spectrums, what is the power spectral density of this QPSK? (Show all steps and reasons)
NRZ-L Data
cos( t)
s(t)

Added by Adri-N W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Prabhat Tyagi

Step 1

First, let's derive the power spectral density at baseband for the BPSK signal. The power spectral density (PSD) at baseband is given by the Fourier transform of the autocorrelation function of the signal. In this case, the BPSK signal is a binary signal with Show more…

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A diagram of a BPSK modulator is shown. If the line code has amplitudes of 5V and pulse width Tb, derive the power spectral density first at baseband, then at the modulator output. If the power spectral density of a QPSK signal is equivalent to adding two of these uncorrelated and orthogonal BPSK spectra, what is the power spectral density of this QPSK? (Show all steps and reasons) NRZ-L Data s(t) cos(Wct)

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