Signals and Systems by unknow

Author:unknow
Language: eng
Format: epub

Practical Considerations

As mentioned before, there are several practical considerations that need to be addressed at each stage of the process shown in Figure 10.13. Some of these will be briefly addressed here, and a more complete model of how discrete time processing of continuous time signals appears in Figure 10.15.

Figure 10.15.

A more complete model of how discrete time processing of continuous time signals is implemented in practice. Notice the addition of anti-aliasing and anti-imaging filters to promote input and output bandlimitedness. The ADC is shown to perform sampling with quantization. The digital filter is further specified to be causal. The DAC is shown to perform imperfect reconstruction, a zero order hold in this case.

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