DEMODULATION - INAOE
telephone 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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Digital Signal Processing - www-elec.inaoep.mx
www-elec.inaoep.mx6 Digital Signal Processing Systems, Basic Filtering Types, and Digital Filter Realizations 159 6.1 The Difference Equation and Digital Filtering 159
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