8

Sampling and Transformations

8.1    Need for Converting a Continuous Signal to a Discrete Signal

We convert a continuous signal to a discrete signal so that we can use the computer to analyze and perform many complex computations that are otherwise very difficult to be carried out analytically. The area of digital signal processing is based on the discretized analogue signal.

When a speech signal is discretized, it becomes very easy to store the spoken words electronically and to transmit these words digitally. This is done using a digital processor. Some digital processors are used to enhance recorded speech. Others are used to generate waveforms that are similar to our spoken words.

In a radar station, a continuous signal is sent ...

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