Cubic Soft-Clipper Spectrum
The cubic soft-clipper, like any polynomial nonlinearity, is defined directly by its series expansion:
In the absence of hard-clipping ( ), bandwidth expansion is limited to a factor of three. This is the slowest aliasing rate obtainable for an odd nonlinearity. Note that smoothing the ``corner'' in the clipping nonlinearity can reduce the severe bandwidth expansion associated with hard-clipping.
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