pypho v1

pypho_sample

Samples an signal at a defined sample numbers. pypho_sample returns the values aof the siganls of each polarisation and the identification number of the symbol as definded in pypho_arbmod ).

The module can plot a constellation diagramme with colored constellation points.

 

pypho_sample.__init__(glova)

Instantiation and parameter setting. All parameters have to be set after ___call___, as the input parameter bits are generated by other moduls.

Parameter	Type	Description
glova	instance	Global parameters

 

Output	Type	Description
User defined variable	pypho_arbmod.pypho_arbmod

 

pypho_sample.__call__(E, constpoints, bits

Parameter	Type	Description
E	list	List in which the signal is defined. Read here about data signal and noise representation The input signal can be optical or electrical.
sampletime	integer	Defines the the sample number, at which the inout signal is sampled.
constpoints	array	Defines the constellation points. Definition of constpoints can be found here pypho_arbmod.
bits	array	Definition of bits can be found here pypho_arbmod.
style	string	Defines the color and style of the constellation points. If two polarisations are plotted, seperate the style definitions by comma. For example: 'x,o': Plots the X-Polarisation with crosses and the Y-Polarisation with circles. No constellation diagramme is plotted, if style = 'None' is set or style is not defined.

 

Output	Type	Description
User defined variable	tuple	Returns a tuple (S_x, S_y, N_x, N_y), where S_x and S_y are arrays representing the samples. N_x and N_y are arrays representing the identification number of the constellation points as defined in pypho_arbmod .

Fig. 1 : Constellation diagramme of the X- and Y-polarisation plane.