问如何找出DVBS2整形SRRC的滤波器系数？

EN

SPS = 4; %for example
n_ISI=32;
rolloff = 0.25;    
n       = linspace(-n_ISI/2,n_ISI/2,n_ISI*SPS+1) ;

rrcFilt = zeros(size(n)) ;

for iter = 1:length(n)
    if n(iter) == 0
        rrcFilt(iter) = 1 - rolloff + 4*rolloff/pi ;
        
    elseif abs(n(iter)) == 1/4/rolloff
        rrcFilt(iter) = rolloff/sqrt(2)*((1+2/pi)*sin(pi/4/rolloff)+(1-2/pi)*cos(pi/4/rolloff)) ;
        
    else
        rrcFilt(iter) = (4*rolloff/pi)/(1-(4*rolloff*n(iter)).^2) * (cos((1+rolloff)*pi*n(iter)) + sin((1-rolloff)*pi*n(iter))/(4*rolloff*n(iter))) ;
    end
end