Digital Signal Processing - INAOE - P
4.1 Discrete Fourier Transform 87 4.1.1 Fourier Series Coefficients of Periodic Digital Signals 88 4.1.2 Discrete Fourier Transform Formulas 92 4.2 Amplitude Spectrum and Power Spectrum 98 4.3 Spectral Estimation Using Window Functions 110 4.4 Application to Speech Spectral Estimation 117 4.5 Fast Fourier Transform 120
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DEMODULATION - INAOE
www-elec.inaoep.mxtelephone headset or a loudspeaker. Consider the heterodyne reception of the code letter A, as shown in figure 3-3, view (A). The code consists of a short burst of cw energy (dot) followed by a longer burst (dash). Assume that the frequency of the received cw signal is 500 kilohertz. The locally generated oscillations are adjusted to a frequency
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