%?Near?perfect?reconstruction?polyphase?filter?bank?demo
%
%?（c）?2007-2010?Wessel?Lubberhuizen

clear?all;
close?all;

%?number?of?taps?per?channel?
L?=?128;
%?number?of?channels
N?=?256;
K=11.4;


display（‘designing?prototype?filter...‘）;
c=npr_coeff（NLK）;

display（‘generating?a?test?signal...‘）;
M?=?4096;?%?number?of?slices


%?generate?a?linear?chirp?as?a?test?signal.
%?matlab‘s?own?chirp?function?has?too?much?phase?noise
%?so?we?use?our?own?version!
t=（0:M*N-1）/（M*N）;
dphi=t;
phi=zeros（size（dphi））;
for?i=2:length（dphi）;
????phi（i）?=?mod（phi（i-1）+dphi（i-1）1）;
end
x?=?exp（-sqrt（-1）*2*pi*phi）;
length（x）
%?add?some?white?noise?if?you?like
%x?=?awgn（x200）;

%?run?it?through?the?npr?filterbank
display（‘processing...‘）;
time1?=?cputime;
y=npr_analysis

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1345??2020-10-22?11:11??license.txt
?????文件????????1715??2020-10-22?11:11??npr.m
?????文件?????????999??2020-10-22?11:11??npr_analysis.m
?????文件????????3427??2020-10-22?11:11??npr_coeff.m
?????文件?????????965??2020-10-22?11:11??npr_synthesis.m