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nyqrofr.m
Package: 现代通信系统matlab版源代码.zip [view]
Upload User: loeagle
Upload Date: 2013-03-02
Package Size: 1236k
Code Size: 0k
Category:
Communication Document
Development Platform:
Matlab
- % Fourier transform of raised-cosine filter
- function y = nyqrofr(alpha, x)
- a = 0.5*(1-alpha);
- b = 0.5*(1+alpha);
- c = abs(x);
- [m,n] = size(x);
- y = zeros(m,n);
- % Innenbereich (Eins)
- bla = find( abs(x) <= a );
- y(bla) = ones(size(bla));
- % Aussenbereich (Null)
- bla = find( abs(x) >= b );
- y(bla) = zeros(size(bla));
- % 躡ergangszone (Rolloff-Bereich)
- bla = find ( abs(x)>a & abs(x)<b );
- y(bla) = 0.5*(1-sin(pi/alpha*(abs(x(bla))-.5)));