diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index bd77fb2..e1b7af3 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -1,9 +1,8 @@
 function [sym_out, H, W] = ofdm_rx(filename, foff, SNR, with_cir)
 %
-% Example: ofdm_rx('drm-15435-if.wav', -174.65, -400, 0)
-% Example: ofdm_tx(40, 1)
-%          ofdm_rx('xv.wav', 0, -400, 0)
-%       or ofdm_rx('yv.wav', 0, -400, 0)
+% Example: ofdm_rx('drm-15435-if.wav', -174.65, 400, 0)
+% Example: ofdm_rx('xv.wav', 0, 400, 0)
+%       or ofdm_rx('yv.wav', 0, 400, 0)
 
 close all;
 
@@ -268,10 +267,20 @@ for k=start:length(Z_)
 		sym_out(:, kk) = sym_eq;
         if 1
 			H_raw(1:2:N) = H_raw(2:2:N);
-			subplot(2, 1, 1)
+			subplot(3, 1, 1)
 			plot(carriers, abs(H_raw(carrier_indexes)), 'b-', carriers, abs(H), 'r-'); grid; title('abs(H)'); axis([ofdm_spec_occ.kmin ofdm_spec_occ.kmax 0 15+0*max(abs(H))]); title(str);
-			subplot(2, 1, 2)
+			subplot(3, 1, 2)
 			plot(carriers, angle(H_raw(carrier_indexes)), 'b-', carriers, angle(H), 'r-'); grid; title('phi(H)'); axis([ofdm_spec_occ.kmin ofdm_spec_occ.kmax -4 4]); title(str);
+			subplot(3, 1, 3)
+			plot(carriers, abs(sym_eq), 'b-'); grid; title('abs(Sym_{Eq})'); axis([ofdm_spec_occ.kmin ofdm_spec_occ.kmax 0 2]); title(str);
+            hold on;
+			for b=c2i(N, carrier_pilot)
+	            x = [b b];
+		        y = [0 2];
+			    plot(x-1,y, 'r-');
+			end
+            hold off;
+
             pause(0.01);
 		else
             fac_c = fac_cell_list{symbol_counter+1};
diff --git a/ofdm/ofdm_tx.m b/ofdm/ofdm_tx.m
index c1b7125..175b026 100644
--- a/ofdm/ofdm_tx.m
+++ b/ofdm/ofdm_tx.m
@@ -1,5 +1,8 @@
-% function ofdm_tx(N_frames)
 function [yv xv] = ofdm_tx(mode, bandwidth, N_frames, withData, plot_speed)
+%
+% function [yv xv] = ofdm_tx(mode, bandwidth, N_frames, withData, plot_speed)
+% Example : ofdm_tx('B', '10k', 500, 1, 0);
+%
 
 close all;