diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index 78a14a7..c004fc7 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -125,14 +125,14 @@ while(fileRemain > fileChunkSize)	% ToDo: don't leave loop, if file has been con
 	if (~isModePassband)
 	    wav_x = wav_x(:, 1) + j*wav_x(:, 2);
 	    x = wav_x;	% ToDo: Remove DC
-		x = x.*exp(j*(2*pi*(foff/fs)*(0:length(x)-1)' + phi_foff)); 
-		phi_foff = mod(phi_foff + 2*pi*(foff/fs)*length(x), 2*pi);
+		x = x.*exp(-j*(2*pi*(-foff/fs)*(0:length(x)-1)' + phi_foff)); 
+		phi_foff = mod(phi_foff + 2*pi*(-foff/fs)*length(x), 2*pi);
 	end
 
 	if (isModePassband)
-	    x = wav_x;	% ToDo: Remove DC
+	    x = wav_x - mean(wav_x);	% ToDo: Remove DC
 		x = x .*exp(-j*(2*pi*(0.25-foff/wav_fs)*(0:length(x)-1)' + phi_mix)); 
-		phi_mix = mod(phi_mix + 2*pi*0.25*length(x), 2*pi);
+		phi_mix = mod(phi_mix + 2*pi*(0.25-foff/wav_fs)*length(x), 2*pi);
 		[x, filter_z] = filter(filter_h, 1, x, filter_z);
 		x = x(1:4:length(x));
 	end