RCF_c

Scicos Block
fr - eng

Raised Cosine filter block

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

Raised Cosine filter block

Palette

Filter - Digital filters palette

Description

The impulse response of that filter is given by :

$\begin{eqnarray} h\left(t\right)=\frac{\sin \left(\pi\frac{t}{T_{\rm s}}\right)... ...ht)}{1-\left(2\pi\frac{\alpha t}{T_{\rm s}}\right)^{2}},\nonumber \end{eqnarray}$

where $\alpha$ is the roll-off factor and $T_{\rm s}$ the symbol period.

The transfert function of that filter is :

$\begin{eqnarray} \frac{H\left(f\right)}{T_{\rm s}}&=&\left\{ \begin{array}{cc... ...T_{\rm s}}<\left\vert f\right\vert.}\nonumber \end{array}\right. \end{eqnarray}$

$\begin{figure}\centering \scalebox{0.75}{% \input{RCF_imp_trsfrt.pstex_t}} \end{figure}$

Figure : Impulse response and transfert function of a Raised Cosine Filter for $\alpha=0.35$ and $\alpha=0.9$ .

Dialog box

$\begin{figure}\begin{center} \epsfig{file=RCF_c_gui.eps,width=300pt} \end{center}\end{figure}$

Size of input vectors
Vector of integers. Set the size of the input vectors. Each integer entry defines a filter.
For a "scalar-based" mode, use size(s) =1.
For a "vector-based" mode, use size(s) greater than 1.
Properties : Type 'vec' of size -1.
Samples per symbol
Vector of integers. Define the number of samples per symbol.
Properties : Type 'vec' of size -1.
Roll-Off Factor
Vector of real. Define the roll-Off factor for each filter.
Properties : Type 'vec' of size -1.
Length of impulse response
Vector of integers. Set the number of coefficients of the Raised Cosine impulse response.
Properties : Type 'vec' of size -1.
Filter Gain
Vector of real. The output gain of the filter.
Properties : Type 'vec' of size -1.
Inherit (no:0, yes:1)
Integer. Herits events by its regular input ports (disable the event input port).
Properties : Type 'vec' of size 1.
Plot impulse response (0:no or winid)
Integer. Plot impulse response in a graphic window. The value of this parameter set the window Id of the graphic.
Properties : Type 'vec' of size 1.