Remove noisy channels out of an array
조회 수: 5 (최근 30일)
이전 댓글 표시
Hello,
How to remove few noisy channels out of 64 channels?
Thanks
댓글 수: 0
채택된 답변
Tarunbir Gambhir
2020년 9월 1일
Assuming that you are trying to remove signals with high noise from a group of channels. You can use the snr function in MATLAB to calculate the Signal-to-Noise ratio for all the channels. This will help you decide and remove the channels that are high in noise.
If you just want noise reduction, then I suggest that you refer to the MATLAB documentation on Signal Smoothing.
댓글 수: 3
Tarunbir Gambhir
2020년 9월 2일
You can refer the following code for removal of rows from a matrix.
t = linspace(0,1,1000);
% creating a sample signal
signal = chirp(t);
% creating a matrix with 20 channels of the above signal with 5db of noise
channelArray = awgn(repmat(signal,20,1),5);
% size of channelArray here is 20x1000
% Lets assume that channel number 3, 7, 13, and 17 needs to be removed
remove = [3, 7, 13,17];
channelArray(remove,:) = [];
% size of channelArray after channel removal is 16x1000
추가 답변 (0개)
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!