Return a gaussian modulated sinusoid: exp(-a t^2) exp(1j*2*pi*fc*t).
If retquad is True, then return the real and imaginary parts (in-phase and quadrature). If retenv is True, then return the envelope (unmodulated signal). Otherwise, return the real part of the modulated sinusoid.
Parameters : | t : ndarray, or the string ‘cutoff’
fc : int, optional
bw : float, optional
bwr: float, optional :
tpr : float, optional
retquad : bool, optional
retenv : bool, optional
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