Combine multiplication filter in time and frequency domain

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T
T 2017 年 3 月 6 日
回答済み: Star Strider 2017 年 3 月 6 日
Hello, I perform a FFT on my signal x, which yields X. Then I perform a multiplication in the frequency with my filter W, which yields the new signal A= X.*Y I perform a IFFT and get a. On a I do a multiplication with filter b to get the wanted signal c= a.*b
Is there a good way to combine these steps to get c from x in a faster way? Because I need to perform several of these. I know my filters, so they can be precalculated.

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Star Strider
Star Strider 2017 年 3 月 6 日
That is not a reliable method to do frequency domain filtering.
Use the Signal Processing Toolbox fftfilt function instead.

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