diff --git a/ofdm/txwin_eval.m b/ofdm/txwin_eval.m
index 871120d..a588dbb 100644
--- a/ofdm/txwin_eval.m
+++ b/ofdm/txwin_eval.m
@@ -1,4 +1,4 @@
-function [p Nt] = txwin_eval(Nu, Ng, Alpha)
+function [p Nt wng] = txwin_eval(Nu, Ng, Alpha)
 
 Nfft = Nu; % FFT size
 CP = Ng; % Nb. samples in Cyclic Prefix
@@ -7,4 +7,4 @@ Nt = 2*round(Nfft*Alpha/2); % Nb. samples in taper region
 p = 1/2*(1+cos(pi*[-Nt+1/2:Nt-1/2]/Nt)); % Raised-Cosine in TD
 p = [p(1:Nt), ones(1,Nfft+CP-Nt), p(Nt+1:2*Nt)]; % Add ones in middle
 
-
+wng = [p(1:Nt), ones(1, Ng-Nt)];
\ No newline at end of file