Converting analog to digital signals and vice versa
2.1 A typical DSP system
In the previous chapter, we mentioned that some signals are discrete-time in nature, while others are continuous-time. Most of the signals encountered in engineering applications are analog. In order to process analog signals using digital techniques, they must first be converted into digital signals.
Digital processing of analog signals proceeds in three stages:
• The analog signal is digitized. Digitization involves two processes: sampling (digitization in time) and quantization (digitization in amplitude). This whole process is called analog-to-digital (A/D) conversion.
• The appropriate DSP algorithms process the digitized signal.
• The results or outputs of ...
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