How to make a signal more flat ?
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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
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
scaramanga
2012-7-20
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.
scaramanga
2012-7-23
更多回答（2 个）
Miro
2012-7-20
0 个投票
you could use SMOOTH it provides a moving average, that makes a signal more continuous(flat)
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2012-7-20
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