comnum.theory_cumulants#

comnum.theory_cumulants(constellation, *, px=None)#

The cumulants of an alphabet (its theoretical features), with the probabilities of its points.

Parameters:

  • constellation (Constellation) – the alphabet.

  • px (array_like, optional) – prior probabilities of the points (uniform by default).

Returns:

as cumulants().

Return type:

dict

Raises:

ValueError – for an invalid parameter or input (the message names it).

Examples

>>> import comnum
>>> round(comnum.theory_cumulants(comnum.Constellation("qam", 16))["c42_normalized"], 2)
-0.68