Scicos Block
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Additive White Gaussian Noise Channel block

\epsfig{file=AWGN_f.eps,height=90pt}

Contents

Palette

Description

This block realizes an additive white gaussian noise channel. It adds noisy samples to the regular input vector and the regular output can be expressed with the following formula :

\begin{eqnarray} y_{k}=u_{k}+\tilde{n}_{k} \end{eqnarray}


where $ u_{k}$ is the k element of the complex regular input (the first input is the real part and the second is the imaginary part), $ y_{k}$ is the complex output vector and $ \tilde{n}_{k}$ the complex noisy sample computed with the box Muller Law formula.

This blocks always computes complex noisy samples, but as shown in the super-block equivalent model, it can be used for real signals by only using the first regular input/output.

Basic blocks equivalent model

\epsfig{file=AWGN_f_sbeq.eps,height=8cm}

Dialog box

\begin{figure}\begin{center} \epsfig{file=AWGN_f_gui.eps,width=260pt} \end{center}\end{figure}

Default properties

Interfacing function

Computational function

See also

Authors

A. Layec