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4
votes
2answers
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Finding linear chirp parameters from a low quality spectrogram, possibly with image processing techniques?

tl;dr: What is a fast way to get the equation of this line? I have to extract the "line of best fit" from this data (shown below), and many others like it (so I need a robust method). It is a a ...
2
votes
1answer
225 views

How can the FFT be used for estimating linear chirp parameters?

Consider a linear chirp signal, i.e. $f(t) = f_0 + kt$, where $f_0$ is the starting frequency, and $k$ is the chirp rate. After applying an FFT, how would I find the starting frequency and chirp rate? ...