Thrown when the signal data (each row) is shorter than this DoubleForward1DFFT instance.
Remarks
If signals are all the same length, this is computationally more efficient than computing
each FFT one at a time using a signal vector.
Get a DoubleSymmetricSignalReader instance by calling the GetSignalReader() method to extract individual
signal FFT's out of the complex conjugate symmetric packed resultant array.
Replaces deprecated FFTInPlace(double[,] arrayinout).