Howtosignalprocessing
- Which filters are used for noise reduction?
- What kind of filter could be used to reduce the 60 cycle noise?
- What is the advantage of filtering the data signal before modulation?
Which filters are used for noise reduction?
Gaussian Filter:
It is a widely used effect in graphics software, typically to reduce image noise and reduce detail.
What kind of filter could be used to reduce the 60 cycle noise?
Eliminate the 60 Hz noise using a Butterworth notch filter. Use designfilt to design the filter. The width of the notch is defined by the 59 to 61 Hz frequency interval. The filter removes at least half the power of the frequency components lying in that range.
What is the advantage of filtering the data signal before modulation?
Filtering takes advantage of the difference between spectra of noise and target to improve SNR, attenuating the data more in the spectral regions dominated by noise, and less in those dominated by the target.
