diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index d10bcc2..3f2ae86 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -255,7 +255,7 @@ H_pilots = [];
 sym_out = [];
 kk = 1;
 H_ = [];
-dw_track_ = [];
+df_track_ = [];
 MIN_ABS_H = 1e-10;
 
 for k=start:length(Z_)
@@ -279,8 +279,8 @@ for k=start:length(Z_)
 		H_pilots = (H_gain)*W_pilots{n+1};
 		ZZ = Z_(carrier_indexes, k-symbols_to_delay).';
 		hhh = H_gain_cell{mod(m-1, frames_per_window)+1};
-		dw_track = angle( (H_pilots) * hhh' + MIN_ABS_H);
-		dw_track_ = [dw_track_ dw_track];
+		df_track = 12000/(2*pi*N)*angle( (H_pilots) * hhh' + MIN_ABS_H);
+		df_track_ = [df_track_ df_track];
 		
 		% check for too small values
 		rms_H = sqrt( abs( H_syms*H_syms' )/length(H_syms) );
@@ -336,7 +336,7 @@ for k=start:length(Z_)
 end
 
 figure;
-plot(dw_track_); grid; title('dw_{track}');
+plot(df_track_); grid; title('df_{track}');
 
 function Y = spec_order(N, X)
     Y = [X(N/2+1:N)' X(1:N/2)']';