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Help required fir recursive computation fft in matlab

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Fareena
Fareena 2014-10-29
评论： MEGHNA LUDRA 17BEC0692 2019-10-13
Hi I am new to matlab... I was reading this book: Applied DSP by manolakis,and get stuck with the following code.. I am using matlab version 2014 and the statement W = exp(-2*pi*sqrt(-1)/N).ˆ(0:m-1)’; in the following code is giving error
The function from the book is as follows for reference:
function Xdft = fftrecur(x)
% Recursive computation of the DFT using divide & conquer
% N should be a power of 2
N = length(x);
if N ==1
Xdft = x;
else
m = N/2;
XE = fftrecur(x(1:2:N));
XO = fftrecur(x(2:2:N));
W = exp(-2*pi*sqrt(-1)/N).ˆ(0:m-1)’;
temp = W.*XO;
Xdft = [ XE+temp ; XO-temp ];
end

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