Mention what is the sign convention used in MatLab's fft routines?
Mention what is the sign convention used in MatLab's fft routines?
Answer
The sign convention used in MatLab’s fft routines are defined as sum(x(i)*exp (-j*i*k/N)) and not sum (x(i)exp(j*i*k/N)). The first version is used by engineers, and the second is used by mathematician.
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