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Multiplexer

__init__()

Initializes the multiplexer used on transmission. Used to concatenate the input data vectors \(X[n]\) and \(Y[n]\) with the preamble vectors \(S_I[n]\) and \(S_Q[n]\), returning the concatenated vectors \(X[n]\) and \(Y[n]\). The multiplexing process is given by the expression below.

\[ \begin{align} X[n] = S_I[n] \oplus X[n] \text{ , } \quad Y[n] = S_Q[n] \oplus Y[n] \end{align} \]

Examples:

>>> import argos3
>>> import numpy as np
>>> 
>>> Si = np.random.randint(0,2,15)
>>> Sq = np.random.randint(0,2,15)
>>> 
>>> X = np.random.randint(0,2,30)
>>> Y = np.random.randint(0,2,30)
>>> 
>>> mux = argos3.Multiplexer()
>>> 
>>> Xn, Yn = mux.concatenate(Si, Sq, X, Y)
>>> 
>>> print(Xn)
[0 0 0 1 0 0 1 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 0 0 1 0 1 0 1 1 1
 0 1 0 1 0 0 0 1]
>>> 
>>> print(Yn)
[0 1 1 0 0 0 1 1 0 0 0 1 1 0 0 1 1 0 0 0 1 1 0 1 1 0 1 1 0 1 1 0 0 1 0 1 1
 0 1 0 0 1 1 1 0]
  • Bitstream Plot Example: pageplot

concatenate(SI, SQ, Xn, Yn)

Concatenates the input data vectors \(X[n]\) and \(Y[n]\) with the preamble vectors \(S_I[n]\) and \(S_Q[n]\), returning the concatenated vectors \(X[n]\) and \(Y[n]\).

Parameters:

Name Type Description Default
SI ndarray

Input vector \(S_I[n]\).

 required
SQ ndarray

Input vector \(S_Q[n]\).

 required
Xn ndarray

Input vector \(X[n]\).

 required
Yn ndarray

Input vector \(Y[n]\).

 required

Returns:

Name Type Description
Xn ndarray

Concatenated vector \(X[n]\).
Yn ndarray

Concatenated vector \(Y[n]\).

Raises:

Type Description
AssertionError

If the vectors I and Q do not have the same length in both channels.