3. Linear filtering
Whether it's to carry out useful processing (selecting a frequency band, extracting a signal from noise, etc.) or to model deformations, such as propagation through a channel, we are led to consider transformations on signals that can, in very general terms, be associated with a system referred to as a "black box" having an input and an output (figure 16 ). In the case of digital signals, a black box is generally taken to mean a program which, starting from the input signal , generates the output signal ...
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Linear filtering
Signal processing
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