Scilab Function
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intsym - discrete symbol integrator

Module

• Modnum

Description

This is a symbol integrator. It likes a discrete integator that resets to zero afer the summation of nech samples.

Calling Sequence

[y[,z]] = intsym(u,nech[,initc,step,z])

Parameters

• u : input vector/matrix (of size n,m) (double or int32)
• nech : number of samples per symbol (scalar)
• initc : initial sample where the integration begins. Must be between 1 and nech (vector of size m) (default 1)
• step : integration step (scalar) (default 1)
• y : output matrix(ces) of size n,m (double)
• z : state of the filter (vector of size m - double)

Example

//one vector of 100 symbols
y = genint(100,1,1,2);
//16-QAM modulation
[yi,yq] = modqam(y,16);
//up-sample by 8
yi_s = upsmpl(yi,8,1);
//compute Root Raised Cosine impulse
//roll-off=0.35, length 128
pulse = filter_tap(1,128,8,0.35,1);
//filtering vector of I/Q components
i = nfilter(yi_s,pulse');
//symbol i integration
g_i = intsym(i,8,5);

Used function(s)

• intsym_c_rout - discrete symbol integrator computational routine (Low level routine)

See Also

• INTSYMB_f

Authors

A. Layec