phy_common: add basic test for sample rate for different bandwidths

lib/src/phy/common/test/CMakeLists.txt

@@ -25,3 +25,12 @@ target_link_libraries(sliv_test srsran_phy)
 add_test(sliv_test_14 sliv_test 14)
 add_test(sliv_test_52 sliv_test 48)
 add_test(sliv_test_52 sliv_test 52)
+
+########################################################################
+# PHY COMMON TEST
+########################################################################
+
+add_executable(phy_common_test phy_common_test.c)
+target_link_libraries(phy_common_test srsran_phy)
+
+add_test(phy_common_test phy_common_test)

lib/src/phy/common/test/phy_common_test.c

@@ -0,0 +1,47 @@
+/**
+ *
+ * \section COPYRIGHT
+ *
+ * Copyright 2013-2021 Software Radio Systems Limited
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the distribution.
+ *
+ */
+#include "srsran/common/test_common.h"
+#include "srsran/phy/common/phy_common.h"
+
+int srsran_default_rates_test()
+{
+  // Verify calculated sample rates for all valid PRB sizes.
+  // By default we use the reduced 3/4 sampling to save bandwidth on the fronthaul.
+  TESTASSERT(srsran_sampling_freq_hz(6) == 1920000);
+  TESTASSERT(srsran_sampling_freq_hz(15) == 3840000);
+  TESTASSERT(srsran_sampling_freq_hz(25) == 5760000);
+  TESTASSERT(srsran_sampling_freq_hz(50) == 11520000);
+  TESTASSERT(srsran_sampling_freq_hz(75) == 15360000); // need to use default rate for 15 MHz BW
+  TESTASSERT(srsran_sampling_freq_hz(100) == 23040000);
+  return SRSRAN_SUCCESS;
+}
+
+int lte_standard_rates_test()
+{
+  // Verify calculated sample rates for all valid PRB sizes.
+  // Enable standard LTE rates (required by some RF HW).
+  srsran_use_standard_symbol_size(true);
+  TESTASSERT(srsran_sampling_freq_hz(6) == 1920000);
+  TESTASSERT(srsran_sampling_freq_hz(15) == 3840000);
+  TESTASSERT(srsran_sampling_freq_hz(25) == 7680000);
+  TESTASSERT(srsran_sampling_freq_hz(50) == 15360000);
+  TESTASSERT(srsran_sampling_freq_hz(75) == 23040000);
+  TESTASSERT(srsran_sampling_freq_hz(100) == 30720000);
+  return SRSRAN_SUCCESS;
+}
+
+int main(int argc, char** argv)
+{
+  TESTASSERT(srsran_default_rates_test() == SRSRAN_SUCCESS);
+  TESTASSERT(lte_standard_rates_test() == SRSRAN_SUCCESS);
+  return SRSRAN_SUCCESS;
+}