1 files changed, 30 insertions, 0 deletions
diff --git a/unittest/ofdm_time_sync.sh b/unittest/ofdm_time_sync.sh
new file mode 100755
index 0000000..fec51c9
--- /dev/null
+++ b/unittest/ofdm_time_sync.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# Shell script version of ofdm_time_sync()
+# David June 2019
+# Tests ofdm modem sync time, using real, off air files
+
+onerun=$(mktemp)
+results=$(mktemp)
+
+# bunch of runs at different time offsets into a sample off air file with low SNR and semi-staionary fading
+for start_secs in `seq 0 29`;
+do
+    if [ "$1" = "700D" ]; then
+        ofdm_demod --in ../wav/vk2tpm_004.wav --out /dev/null --verbose 2 --ldpc \
+                   --start_secs $start_secs --len_secs 5 2>/dev/null > $onerun
+    fi;
+    if [ "$1" = "2020" ]; then
+        ofdm_demod --mode 2020 --in ../wav/david4.wav --out /dev/null --verbose 2 --ldpc \
+                   --start_secs $start_secs  --len_secs 5 2>/dev/null > $onerun
+    fi;
+    [ ! $? -eq 0 ] && { echo "error running ofdm_demod"; exit 1; }
+    cat $onerun | sed -n "s/time_to_sync: \([0-9..]*\)/\1/p" >> $results
+done
+# a pass is we never take longer than 5 secs to sync (mean is much smaller)
+python3 -c "
+import sys; import numpy as np
+x=np.loadtxt(\"$results\")
+fails=sum(x == -1)
+print(\"fails: %d mean: %5.2f var: %5.2f \" % (fails, np.mean(x), np.var(x)))
+sys.exit(0) if fails==0 else sys.exit(1)
+"