diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index 924b5c6..1b132a4 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -56,8 +56,8 @@ x = x +  sqrt(0.5)*10^(knoise_dB/20)*(randn(size(x)) + j*randn(size(x)));
 K = fix((length(x))/(N+Ng))-1;
 
 % Timing coarse
-cp_off_ = [];
 cp_off = 0;
+cp_off_ = [];
 if 1
     fprintf('Coarse timing estimation\n');
     Z = 0;
@@ -75,8 +75,6 @@ end
 fdet_coarse_Z = 0;
 Z_cfa_pre = 0;
 df_i_ = [];
-df_ = [];
-f_pilots = carrier_pilot'/N*fs
 valid_latency_count = 20;
 if 1
 fprintf('Coarse integer CFO estimation\n');