diff --git a/ofdm/fdet_eval.m b/ofdm/fdet_eval.m
index 207dcf8..e3ee03f 100644
--- a/ofdm/fdet_eval.m
+++ b/ofdm/fdet_eval.m
@@ -1,12 +1,11 @@
-function fdet_eval()
+function fdet_eval(f_true, knoise_dB)
 
 fs = 48000;
 N = 1024;
 
-f_true = 2000.000;
 phi_true = 1;
 
-x_true = exp(j*(2*pi*f_true/fs*(0:N-1)'+phi_true));
+x_true = exp(j*(2*pi*f_true/fs*(0:N-1)'+phi_true)) + sqrt(10^(knoise_dB/10))*randn(N,1);
 
 % Initial guess
 X = fft(x_true, N);