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System Impulse Response Calculation

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Uploaded by on Jan 2, 2008

Demonstration of real-time system impulse response calculations using a simplified crosscorrelation algorithm and an inexpensive A/D converter.

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Science & Technology

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  • monkeys at work :D 

  • What I did was send a 4096 sample sinewave sweep from 0 to the nyquist, play it looped through the system under test, then record the result, then trimmed where I thought a 4096 sample cycle began and did an 8192 point FFT on the recording, multiplied the magnitudes with the magnitudes of the spectrum of a reversed 4096 sample sweep and added the phases, then did an inverse FFT to get the impulse response...if the result starts late I run a later part of the recording into the FFT/IFFT...

  • thanks helpfull stuff ,very comprehensive

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