From 19920264890f5a860cb44e3ce7abff167e9d4735 Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sat, 2 May 2015 08:59:03 +0000
Subject: [PATCH] [RX] - plot df_track

git-svn-id: http://moon:8086/svn/matlab/trunk@53 801c6759-fa7c-4059-a304-17956f83a07c
---
 ofdm/ofdm_rx.m | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index b97e7b0..925c8df 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -244,6 +244,7 @@ H_pilots = [];
 sym_out = [];
 kk = 1;
 H_ = [];
+df_track_ = [];
 for k=start:length(Z_)
     
     %shifted symbol index
@@ -255,7 +256,8 @@ for k=start:length(Z_)
     carrier_gain_bins = c2i(N, carrier_gain);
 
 	if ~isempty(H_pilots)
-		delta_freq_offset = fs/(2*pi*N)*angle( H_pilots * conj(H2_))
+		df_track = fs/(2*pi*N)*angle( H_pilots * conj(H2_));
+		df_track_ = [df_track_ df_track];
 	end
 	H2_ = H_;
 	H_= Z_(carrier_gain_bins, k)./(mag_gain.*exp(j*2*pi*phi_gain/1024)).';
@@ -307,5 +309,8 @@ for k=start:length(Z_)
 
 end
 
+figure;
+plot(df_track_); grid; title('df_{track}');
+
 function Y = spec_order(N, X)
     Y = [X(N/2+1:N)' X(1:N/2)']';