?? fft_evenodd.m
字號(hào):
function [xe, xo]= fft_evenodd(x)% function [xe, xo]= fft_evenodd(x)% This file is part of the TFPM toolbox v0.5 (c)% michael.jachan@tuwien.ac.at and underlies the GPL.% % Computes the even (xe) and odd (xo) parts of an fft-frame-signal% x[n] as %% xe[n]= (x[n] + x^*?[-n])/2,% xo[n]= (x[n] - x^*?[-n])/2.%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%if(0)% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%clear;tfpm;N= 256;x= j*[4 1 2 3 2 0 0 0].';x= randn(N, 1)+j*randn(N, 1);figure(97);plot(x);%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%end;% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%x= x(:);X= [x(1); flipud(x(2:end))];%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%if(0)% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%figure(98);plot(X);%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%end;% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%xe= (x + conj(X))/2;%xo= (x - conj(X))/2;xe= (x + X)/2;xo= (x - X)/2;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%if(0)% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%figure(98);subplot(2, 1, 1);plot(xe);subplot(2, 1, 2);plot(xo);xe+xo-xxe-xo-Xx= fft_causal(randn(233, 1));[xe, xo]= fft_evenodd(x);max(x-xe.*fft_u(length(x)))%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%end;% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%?? 快捷鍵說(shuō)明
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