diff --git a/impl/test/layer1/test_freq_est.c b/impl/test/layer1/test_freq_est.c
index fbcff5f..5c82142 100644
--- a/impl/test/layer1/test_freq_est.c
+++ b/impl/test/layer1/test_freq_est.c
@@ -1,8 +1,5 @@
 #include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <ctype.h>
+#include <time.h>
 
 #include <liquid/liquid.h>
 
@@ -21,18 +18,26 @@
 
 int main(void)
 {
-#define N 1024
+#define N 63
 	float complex s1[N];
 	float complex s2[N];
+	float complex s3[N];
 
 	nco_crcf nco;
+	channel_cccf chan;
 
 	// ** Initialize **
 
+	srand(time(NULL));
+
 	nco = nco_crcf_create(LIQUID_NCO);
 
-	nco_crcf_set_frequency(nco, 0.05f);
-	nco_crcf_set_phase(nco, 1.37f);
+	nco_crcf_set_frequency(nco, -0.08f);
+	nco_crcf_set_phase(nco, -1.37f);
+
+	chan = channel_cccf_create();
+
+	channel_cccf_add_awgn(chan, -80, 5);
 
 	// ** Generate signal **
 
@@ -44,14 +49,17 @@ int main(void)
 
 	nco_crcf_mix_block_up(nco, s1, s2, N);
 
+	channel_cccf_execute_block(chan, s2, N, s3);
+
 	dump_array_cf(s1, N, 1.0f, "/tmp/freq_est_source.cpx");
 	dump_array_cf(s2, N, 1.0f, "/tmp/freq_est_mixed.cpx");
+	dump_array_cf(s3, N, 1.0f, "/tmp/freq_est_channelized.cpx");
 
 
 	// ** Estimate frequency **
 
 	float final_phase;
-	float est_freq = freq_est_data_free(s2, 32, &final_phase);
+	float est_freq = freq_est_data_free(s3, N, &final_phase);
 
 	fprintf(stderr, "Estimated frequency: %.6f rad/sample\n", est_freq);
 	fprintf(stderr, "Final phase: %.6f rad\n", final_phase);