diff --git a/ofdm/ofdm_tx.m b/ofdm/ofdm_tx.m
index a01806b..cb838d0 100644
--- a/ofdm/ofdm_tx.m
+++ b/ofdm/ofdm_tx.m
@@ -3,7 +3,7 @@ function [yv xv] = ofdm_tx(mode, bandwidth, N_frames, withData)
 
 close all;
 
-DO_PLOT = 1;
+DO_PLOT = 0;
 WITH_RCWIN = 1;
 WITH_FREQ_REF = 1;
 WITH_TIME_REF = 1;
@@ -16,10 +16,7 @@ RCWIN_ROLLOFF = 0.125;
 
 % Params
 fa = 48000;
-fc = fa/4;
-F1 = 750;
-F2 = 2250;
-F3 = 3000;
+T = 4/fa;
 
 [ofdm_params, ofdm_spec_occ] = drm_params(mode, bandwidth);
 
@@ -27,7 +24,6 @@ ofdm_params_mode = ofdm_params.mode
 ofdm_spec_occ_kmin = ofdm_spec_occ.kmin
 ofdm_spec_occ_kmax = ofdm_spec_occ.kmax
 
-T = 4/fa;
 Tu = ofdm_params.nu * T
 Tg = ofdm_params.ng * T
 Ts = Tu+Tg
@@ -111,7 +107,7 @@ grid;
 plot(wng); grid;
 
 % Modulate on carrier
-yc = exp(j*2*pi.*(0:length(xv)-1)*fc/fa) .* xv;
+yc = exp(j*2*pi.*(0:length(xv)-1)*0.25) .* xv;
 yv = real(yc) + imag(yc);
 
 xv = conj(xv')./abs(max(xv));