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Decimation is a technique for reducing the number of samples in a discrete-time signal.

4 votes

Decimation of signal. How to plot frequency spectrum

The root of your problem is that you are not familiar with the Nyquist Sampling Theorem. First of all, I question your premise that your sample rate is 70 MHz and that you can represent your signals, …
Jim Clay's user avatar
  • 12.2k
3 votes

Basic method for 2x oversampling?

Yes, your method is correct, and will work just fine. You can reduce the computational load by combining the upsampling (insertion of zeros) and low-pass filter into a single interpolating filter, an …
Jim Clay's user avatar
  • 12.2k
3 votes
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CIC Filter vs Simple Downsampler

If you are only decimating by four, then a CIC filter is not the way to go. CIC filters have two advantages and one big disadvantage. The advantages are that they don't require any multipliers, just …
Jim Clay's user avatar
  • 12.2k