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Signal Processing

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  • $\begingroup$ Thank you very much! So far I've been transmitting a chirp that lasts 25ms, and the reception goes on for 32ms (so there's an underlying assumption that the channel is 7ms long due to short distances between speaker and mic). I've padded the chirp samples with zeroes to match the reception length (in samples) and using this scheme gave me the graph attached in the question. I'll continue with my observations in a following comment, due to a lack of characters... $\endgroup$ Commented Dec 11, 2015 at 20:36
  • $\begingroup$ I've read that using a sine-sweep and performing a deconvolution results in separating nonlinear harmonics to "behind" the channel response in time, so that might be what's moved cyclicly and runs over the channel. Do you think there is a solution to this problem, given the limitations? I'm pretty much filling up the 32kB memory on the microcontroller I'm using with two 2048-float arrays that constitute a general array I'm working on and take up 16kB (doing things in-place) and two more int-arrays that take up 12kB more, so there's not a lot of memory left to use. $\endgroup$ Commented Dec 11, 2015 at 20:43