1. Introduction

     Sampling is essential to convert analog signal to digital signal. In this page, I would specifically explain about downsampling.
In digital signal processing, the decimator performs decimation, which is downsampling a signal. In other words, when a digital
signal is downsampled, the signal's sampling rate would be reduced.

2. Derivation

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3. Example

If) D = 2

4. Conclusion

make sure to answer the question!!!!!!