The frequency of the useful signal is concentrated near the 0 frequency, while most of the noise and interference signals are in other frequency bands. We now need to: 1. Suppress as much noise and interference signals as possible in the sampled signal; 2. Perform spectrum analysis on the retained useful signal. How to do?
www.utmel.com/blog/categories/filters/what-is-filter
The frequency of the useful signal is concentrated near the 0 frequency, while most of the noise and interference signals are in other frequency bands. We now need to: 1. Suppress as much noise and interference signals as possible in the sampled signal; 2. Perform spectrum analysis on the retained useful signal. How to do?
www.utmel.com/blog/categories/filters/what-is-filter