DigComT

RaisedCos

DirectoryDOS NameType
Signals raisdcos m-function

Purpose

The raised cosine signal

Calling Sequence


y = RaisedCos(x, alpha, T)

INPUTS

Input Description
1 x 
Vector of values at which to
calculate the raised cosine signal

Optional INPUTS

Input Description Default Value
2 alpha 
Spreading factor

0
3 T 
Period

1

OUTPUTS

Output Description
1 y 
Vector containing values of
the raised cosine signal calculated
at values in the vector x

Description

RaisedCos() calculates the value of the raised
cosine signal with period T and spreading factor
alpha as define by the following equations.


y = Sinc(x/T)*cos(pi*alpha*x/T)/(1-(2*alpha*x/T)^2)
y = (pi/4)*Sinc(x)*
(Sinc(alpha*x/T+.5) + Sinc(alpha*x/T-.5)

Example


x = linspace(-10,10,100);
y = RaisedCos(x,0.1,1);
plot(x,y,'r'); xlabel('x');
ylabel('RaisedCos(x,0.1,1)')
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DigComT Licensee: Chris Heegard 

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Last modified: Tuesday, January 11, 2000
Date created: Tuesday, January 11, 2000


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