How to make a signal more flat ?
9 次查看(过去 30 天)
显示 更早的评论
Hello,
I have a signal which looks like a dome and I would like to make it flat (hence reducing its amplitude). I can reduce the amplitude by dividing the whole signal by the same amount, but I would like to be able to control the amount of reduction I do on each signal location. Any idea of what kind of operation i should use ?
Regards
0 个评论
采纳的回答
Image Analyst
2012-7-20
You can subtract the mean
newSignal = yourSignal - mean(yourSignal);
Then multiply by the array that contains the reduction factors that varies as a function of location:
flattenedSignal = reductionFactors .* newSignal;
Note, you must have reductionFactors because you said "I would like to be able to control the amount of reduction I do on each signal location" so you obviously know what those reductions are. Then finally add back in the mean:
finalSignal = flattenedSignal + mean(yourSignal);
3 个评论
Miro
2012-7-20
this depends on the theoretical background of the data. I mean sure, you can just cut the signal fe. like:
ref = yoursignal/max(yoursignal);
newSignal = yoursignal*exp(-ref);
in this case larger signals get cutted more than smaller ones relative to the maximum of the signal.
更多回答(2 个)
Miro
2012-7-20
you could use SMOOTH it provides a moving average, that makes a signal more continuous(flat)
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Multirate Signal Processing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!