git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4181 818b1a75-f10b-46b9-bf7c-635c3b92a50f

2013-10-07 15:45:39 +00:00
parent 047913d213
commit 07d18bb4f1
4 changed files with 60 additions and 26 deletions
@@ -0,0 +1,13 @@
+function sigt = ofdm_mod(sigf,amp)
+[Nant,Nsymb,Nsub] = size(sigf);
+sigt = zeros(Nant,Nsymb*640);
+for i=1:Nsymb
+    symbol=squeeze(sigf(:,i,:));
+    % insert zero subcarriers
+    symbol=cat(2,zeros(Nant,1),symbol(:,1:150),zeros(Nant,210),symbol(:,151:301));
+    % ofdm modulation
+    symbol_t=ifft(symbol,512,2);
+    % Adding cycl. prefix making the block of 640 elements
+    symbol_cp = cat(2,symbol_t(:,end-127:end), symbol_t);
+    sigt(:,(1:640)+(i-1)*640)=floor(amp*symbol_cp);
+end