diff --git a/common/utils/lte/prach_utils.c b/common/utils/lte/prach_utils.c
new file mode 100644
index 0000000000..9ef29e55a5
--- /dev/null
+++ b/common/utils/lte/prach_utils.c
@@ -0,0 +1,425 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file common/utils/lte/prach_utils.c
+ * \brief utils for PRACH  common to both PHY and MAC
+ * \author R. Knopp
+ * \date 2020
+ * \version 0.1
+ * \company Eurecom
+ * \email: knopp@eurecom.fr
+ * \note
+ * \warning
+ */
+
+#include <stdint.h>
+
+
+#include "PHY/LTE_TRANSPORT/transport_common.h"
+
+// This is table 5.7.1-4 from 36.211
+PRACH_TDD_PREAMBLE_MAP tdd_preamble_map[64][7] = {
+  // TDD Configuration Index 0
+  { {1,{{0,1,0,2}}},{1,{{0,1,0,1}}}, {1,{{0,1,0,0}}}, {1,{{0,1,0,2}}}, {1,{{0,1,0,1}}}, {1,{{0,1,0,0}}}, {1,{{0,1,0,2}}}},
+  // TDD Configuration Index 1
+  { {1,{{0,2,0,2}}},{1,{{0,2,0,1}}}, {1,{{0,2,0,0}}}, {1,{{0,2,0,2}}}, {1,{{0,2,0,1}}}, {1,{{0,2,0,0}}}, {1,{{0,2,0,2}}}},
+  // TDD Configuration Index 2
+  { {1,{{0,1,1,2}}},{1,{{0,1,1,1}}}, {1,{{0,1,1,0}}}, {1,{{0,1,0,1}}}, {1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,1,1}}}},
+  // TDD Configuration Index 3
+  { {1,{{0,0,0,2}}},{1,{{0,0,0,1}}}, {1,{{0,0,0,0}}}, {1,{{0,0,0,2}}}, {1,{{0,0,0,1}}}, {1,{{0,0,0,0}}}, {1,{{0,0,0,2}}}},
+  // TDD Configuration Index 4
+  { {1,{{0,0,1,2}}},{1,{{0,0,1,1}}}, {1,{{0,0,1,0}}}, {1,{{0,0,0,1}}}, {1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,1,1}}}},
+  // TDD Configuration Index 5
+  { {1,{{0,0,0,1}}},{1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,1}}}},
+  // TDD Configuration Index 6
+  { {2,{{0,0,0,2},{0,0,1,2}}}, {2,{{0,0,0,1},{0,0,1,1}}}, {2,{{0,0,0,0},{0,0,1,0}}}, {2,{{0,0,0,1},{0,0,0,2}}}, {2,{{0,0,0,0},{0,0,0,1}}}, {2,{{0,0,0,0},{1,0,0,0}}}, {2,{{0,0,0,2},{0,0,1,1}}}},
+  // TDD Configuration Index 7
+  { {2,{{0,0,0,1},{0,0,1,1}}}, {2,{{0,0,0,0},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,0},{0,0,0,2}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,1},{0,0,1,0}}}},
+  // TDD Configuration Index 8
+  { {2,{{0,0,0,0},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,0},{0,0,0,1}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,0},{0,0,1,1}}}},
+  // TDD Configuration Index 9
+  { {3,{{0,0,0,1},{0,0,0,2},{0,0,1,2}}}, {3,{{0,0,0,0},{0,0,0,1},{0,0,1,1}}}, {3,{{0,0,0,0},{0,0,1,0},{1,0,0,0}}}, {3,{{0,0,0,0},{0,0,0,1},{0,0,0,2}}}, {3,{{0,0,0,0},{0,0,0,1},{1,0,0,1}}}, {3,{{0,0,0,0},{1,0,0,0},{2,0,0,0}}}, {3,{{0,0,0,1},{0,0,0,2},{0,0,1,1}}}},
+  // TDD Configuration Index 10
+  { {3,{{0,0,0,0},{0,0,1,0},{0,0,1,1}}}, {3,{{0,0,0,1},{0,0,1,0},{0,0,1,1}}}, {3,{{0,0,0,0},{0,0,1,0},{1,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,0},{0,0,0,1},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,0},{0,0,0,2},{0,0,1,0}}}},
+  // TDD Configuration Index 11
+  { {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,0},{0,0,0,1},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,1},{0,0,1,0},{0,0,1,1}}}},
+  // TDD Configuration Index 12
+  { {4,{{0,0,0,1},{0,0,0,2},{0,0,1,1},{0,0,1,2}}}, {4,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1}}},
+    {4,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0}}},
+    {4,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,2}}},
+    {4,{{0,0,0,0},{0,0,0,1},{1,0,0,0},{1,0,0,1}}},
+    {4,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0}}},
+    {4,{{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1}}}
+  },
+  // TDD Configuration Index 13
+  { {4,{{0,0,0,0},{0,0,0,2},{0,0,1,0},{0,0,1,2}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,1}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,1}}}
+  },
+  // TDD Configuration Index 14
+  { {4,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{0,0,0,2},{0,0,1,0},{0,0,1,1}}}
+  },
+  // TDD Configuration Index 15
+  { {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,1},{0,0,1,2}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1},{1,0,0,1}}},
+    {5,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,1},{1,0,0,2}}},
+    {5,{{0,0,0,0},{0,0,0,1},{1,0,0,0},{1,0,0,1},{2,0,0,1}}}, {5,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0}}},
+    {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1}}}
+  },
+  // TDD Configuration Index 16
+  { {5,{{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1},{0,0,1,2}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1},{1,0,1,1}}},
+    {5,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,1,0}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,0},{1,0,0,2}}},
+    {5,{{0,0,0,0},{0,0,0,1},{1,0,0,0},{1,0,0,1},{2,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}
+  },
+  // TDD Configuration Index 17
+  { {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,2}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1},{1,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {5,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,0},{1,0,0,1}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}
+  },
+  // TDD Configuration Index 18
+  { {6,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1},{0,0,1,2}}},
+    {6,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1},{1,0,0,1},{1,0,1,1}}},
+    {6,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0},{2,0,1,0}}},
+    {6,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{1,0,0,0},{1,0,0,1},{1,0,0,2}}},
+    {6,{{0,0,0,0},{0,0,0,1},{1,0,0,0},{1,0,0,1},{2,0,0,0},{2,0,0,1}}},
+    {6,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0},{5,0,0,0}}},
+    {6,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1},{1,0,0,2}}}
+  },
+  // TDD Configuration Index 19
+  { {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,0},{0,0,0,1},{0,0,1,0},{0,0,1,1},{1,0,0,0},{1,0,1,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,0},{0,0,0,1},{0,0,0,2},{0,0,1,0},{0,0,1,1},{1,0,1,1}}}
+  },
+  // TDD Configuration Index 20
+  { {1,{{0,1,0,1}}},{1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,1}}}, {1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,1}}}},
+  // TDD Configuration Index 21
+  { {1,{{0,2,0,1}}},{1,{{0,2,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,1}}}, {1,{{0,2,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,1}}}},
+
+  // TDD Configuration Index 22
+  { {1,{{0,1,1,1}}},{1,{{0,1,1,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,1,0}}}},
+
+  // TDD Configuration Index 23
+  { {1,{{0,0,0,1}}},{1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,1}}}, {1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,1}}}},
+
+  // TDD Configuration Index 24
+  { {1,{{0,0,1,1}}},{1,{{0,0,1,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,1,0}}}},
+
+  // TDD Configuration Index 25
+  { {2,{{0,0,0,1},{0,0,1,1}}}, {2,{{0,0,0,0},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,1},{1,0,0,1}}}, {2,{{0,0,0,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,1},{0,0,1,0}}}},
+
+  // TDD Configuration Index 26
+  { {3,{{0,0,0,1},{0,0,1,1},{1,0,0,1}}}, {3,{{0,0,0,0},{0,0,1,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,1},{1,0,0,1},{2,0,0,1}}}, {3,{{0,0,0,0},{1,0,0,0},{2,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,1},{0,0,1,0},{1,0,0,1}}}},
+
+  // TDD Configuration Index 27
+  { {4,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1}}}, {4,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1}}},
+    {4,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0}}}
+  },
+
+  // TDD Configuration Index 28
+  { {5,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1},{2,0,0,1}}}, {5,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {5,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1},{4,0,0,1}}},
+    {5,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {5,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0},{2,0,0,1}}}
+  },
+
+  // TDD Configuration Index 29
+  { {6,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1},{2,0,0,1},{2,0,1,1}}},
+    {6,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0},{2,0,1,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1},{4,0,0,1},{5,0,0,1}}},
+    {6,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0},{5,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0},{2,0,0,1},{2,0,1,0}}}
+  },
+
+
+  // TDD Configuration Index 30
+  { {1,{{0,1,0,1}}},{1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,1}}}, {1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,1}}}},
+
+  // TDD Configuration Index 31
+  { {1,{{0,2,0,1}}},{1,{{0,2,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,1}}}, {1,{{0,2,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,1}}}},
+
+  // TDD Configuration Index 32
+  { {1,{{0,1,1,1}}},{1,{{0,1,1,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,1,0}}}},
+
+  // TDD Configuration Index 33
+  { {1,{{0,0,0,1}}},{1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,1}}}, {1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,1}}}},
+
+  // TDD Configuration Index 34
+  { {1,{{0,0,1,1}}},{1,{{0,0,1,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,1,0}}}},
+
+  // TDD Configuration Index 35
+  { {2,{{0,0,0,1},{0,0,1,1}}}, {2,{{0,0,0,0},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,1},{1,0,0,1}}}, {2,{{0,0,0,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,1},{0,0,1,0}}}},
+
+  // TDD Configuration Index 36
+  { {3,{{0,0,0,1},{0,0,1,1},{1,0,0,1}}}, {3,{{0,0,0,0},{0,0,1,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,1},{1,0,0,1},{2,0,0,1}}}, {3,{{0,0,0,0},{1,0,0,0},{2,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,1},{0,0,1,0},{1,0,0,1}}}},
+
+  // TDD Configuration Index 37
+  { {4,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1}}}, {4,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1}}},
+    {4,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0}}}
+  },
+
+  // TDD Configuration Index 38
+  { {5,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1},{2,0,0,1}}}, {5,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {5,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1},{4,0,0,1}}},
+    {5,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {5,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0},{2,0,0,1}}}
+  },
+
+  // TDD Configuration Index 39
+  { {6,{{0,0,0,1},{0,0,1,1},{1,0,0,1},{1,0,1,1},{2,0,0,1},{2,0,1,1}}},
+    {6,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0},{2,0,0,0},{2,0,1,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,1},{1,0,0,1},{2,0,0,1},{3,0,0,1},{4,0,0,1},{5,0,0,1}}},
+    {6,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0},{4,0,0,0},{5,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {6,{{0,0,0,1},{0,0,1,0},{1,0,0,1},{1,0,1,0},{2,0,0,1},{2,0,1,0}}}
+  },
+
+  // TDD Configuration Index 40
+  { {1,{{0,1,0,0}}},{0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,1,0,0}}}},
+  // TDD Configuration Index 41
+  { {1,{{0,2,0,0}}},{0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,2,0,0}}}},
+
+  // TDD Configuration Index 42
+  { {1,{{0,1,1,0}}},{0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}},
+
+  // TDD Configuration Index 43
+  { {1,{{0,0,0,0}}},{0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {1,{{0,0,0,0}}}},
+
+  // TDD Configuration Index 44
+  { {1,{{0,0,1,0}}},{0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}, {0,{{0,0,0,0}}}},
+
+  // TDD Configuration Index 45
+  { {2,{{0,0,0,0},{0,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0}}}, {2,{{0,0,0,0},{1,0,0,0}}}},
+
+  // TDD Configuration Index 46
+  { {3,{{0,0,0,0},{0,0,1,0},{1,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,0},{1,0,0,0},{2,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0}}}, {3,{{0,0,0,0},{1,0,0,0},{2,0,0,0}}}},
+
+  // TDD Configuration Index 47
+  { {4,{{0,0,0,0},{0,0,1,0},{1,0,0,0},{1,0,1,0}}}, {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {0,{{0,0,0,0},{0,0,0,0},{0,0,0,0},{0,0,0,0}}},
+    {4,{{0,0,0,0},{1,0,0,0},{2,0,0,0},{3,0,0,0}}}
+  }
+};
+
+
+uint8_t get_prach_fmt(int prach_ConfigIndex,int frame_type) {
+  if (frame_type == FDD) // FDD
+    return(prach_ConfigIndex>>4);
+  else {
+    if (prach_ConfigIndex < 20)
+      return (0);
+
+    if (prach_ConfigIndex < 30)
+      return (1);
+
+    if (prach_ConfigIndex < 40)
+      return (2);
+
+    if (prach_ConfigIndex < 48)
+      return (3);
+    else
+      return (4);
+  }
+}
+
+uint8_t get_prach_prb_offset(int frame_type,
+			     int tdd_config,
+                             int N_RB_UL,
+                             uint8_t prach_ConfigIndex,
+                             uint8_t n_ra_prboffset,
+                             uint8_t tdd_mapindex, uint16_t Nf) {
+  uint8_t n_ra_prb;
+  uint8_t f_ra,t1_ra;
+  uint8_t prach_fmt = get_prach_fmt(prach_ConfigIndex,frame_type);
+  uint8_t Nsp=2;
+
+  if (frame_type == TDD) { // TDD
+    if (tdd_preamble_map[prach_ConfigIndex][tdd_config].num_prach==0) {
+      LOG_E(PHY, "Illegal prach_ConfigIndex %"PRIu8"", prach_ConfigIndex);
+      return(-1);
+    }
+
+    // adjust n_ra_prboffset for frequency multiplexing (p.36 36.211)
+    f_ra = tdd_preamble_map[prach_ConfigIndex][tdd_config].map[tdd_mapindex].f_ra;
+
+    if (prach_fmt < 4) {
+      if ((f_ra&1) == 0) {
+        n_ra_prb = n_ra_prboffset + 6*(f_ra>>1);
+      } else {
+        n_ra_prb = N_RB_UL - 6 - n_ra_prboffset + 6*(f_ra>>1);
+      }
+    } else {
+      if ((tdd_config >2) && (tdd_config<6))
+        Nsp = 2;
+
+      t1_ra = tdd_preamble_map[prach_ConfigIndex][tdd_config].map[0].t1_ra;
+
+      if ((((Nf&1)*(2-Nsp)+t1_ra)&1) == 0) {
+        n_ra_prb = 6*f_ra;
+      } else {
+        n_ra_prb = N_RB_UL - 6*(f_ra+1);
+      }
+    }
+  } else { //FDD
+    n_ra_prb = n_ra_prboffset;
+  }
+
+  return(n_ra_prb);
+}
+
+int is_prach_subframe0(int tdd_config,int frame_type,uint8_t prach_ConfigIndex,uint32_t frame, uint8_t subframe) {
+  uint8_t t0_ra;
+  uint8_t t1_ra;
+  uint8_t t2_ra;
+  int prach_mask = 0;
+
+  if (frame_type == FDD) { //FDD
+    //implement Table 5.7.1-2 from 36.211 (Rel-10, p.41)
+    if ((((frame&1) == 1) && (subframe < 9)) ||
+        (((frame&1) == 0) && (subframe == 9)))  // This is an odd frame, ignore even-only PRACH frames
+      if (((prach_ConfigIndex&0xf)<3) || // 0,1,2,16,17,18,32,33,34,48,49,50
+          ((prach_ConfigIndex&0x1f)==18) || // 18,50
+          ((prach_ConfigIndex&0xf)==15))   // 15,47
+        return(0);
+
+    switch (prach_ConfigIndex&0x1f) {
+      case 0:
+      case 3:
+        if (subframe==1) prach_mask = 1;
+
+        break;
+
+      case 1:
+      case 4:
+        if (subframe==4) prach_mask = 1;
+
+        break;
+
+      case 2:
+      case 5:
+        if (subframe==7) prach_mask = 1;
+
+        break;
+
+      case 6:
+        if ((subframe==1) || (subframe==6)) prach_mask=1;
+
+        break;
+
+      case 7:
+        if ((subframe==2) || (subframe==7)) prach_mask=1;
+
+        break;
+
+      case 8:
+        if ((subframe==3) || (subframe==8)) prach_mask=1;
+
+        break;
+
+      case 9:
+        if ((subframe==1) || (subframe==4) || (subframe==7)) prach_mask=1;
+
+        break;
+
+      case 10:
+        if ((subframe==2) || (subframe==5) || (subframe==8)) prach_mask=1;
+
+        break;
+
+      case 11:
+        if ((subframe==3) || (subframe==6) || (subframe==9)) prach_mask=1;
+
+        break;
+
+      case 12:
+        if ((subframe&1)==0) prach_mask=1;
+
+        break;
+
+      case 13:
+        if ((subframe&1)==1) prach_mask=1;
+
+        break;
+
+      case 14:
+        prach_mask=1;
+        break;
+
+      case 15:
+        if (subframe==9) prach_mask=1;
+
+        break;
+    }
+  } else { // TDD
+    AssertFatal(prach_ConfigIndex<64,
+                "Illegal prach_ConfigIndex %d for ",prach_ConfigIndex);
+    AssertFatal(tdd_preamble_map[prach_ConfigIndex][tdd_config].num_prach>0,
+                "Illegal prach_ConfigIndex %d for ",prach_ConfigIndex);
+    t0_ra = tdd_preamble_map[prach_ConfigIndex][tdd_config].map[0].t0_ra;
+    t1_ra = tdd_preamble_map[prach_ConfigIndex][tdd_config].map[0].t1_ra;
+    t2_ra = tdd_preamble_map[prach_ConfigIndex][tdd_config].map[0].t2_ra;
+#ifdef PRACH_DEBUG
+    LOG_I(PHY,"[PRACH] Checking for PRACH format (ConfigIndex %d) in TDD subframe %d (%d,%d,%d)\n",
+          prach_ConfigIndex,
+          subframe,
+          t0_ra,t1_ra,t2_ra);
+#endif
+
+    if ((((t0_ra == 1) && ((frame &1)==0))||  // frame is even and PRACH is in even frames
+         ((t0_ra == 2) && ((frame &1)==1))||  // frame is odd and PRACH is in odd frames
+         (t0_ra == 0)) &&                                // PRACH is in all frames
+        (((subframe<5)&&(t1_ra==0)) ||                   // PRACH is in 1st half-frame
+         (((subframe>4)&&(t1_ra==1))))) {                // PRACH is in 2nd half-frame
+      if ((prach_ConfigIndex<48) &&                          // PRACH only in normal UL subframe
+          (((subframe%5)-2)==t2_ra)) prach_mask=1;
+      else if ((prach_ConfigIndex>47) && (((subframe%5)-1)==t2_ra)) prach_mask=1;      // PRACH can be in UpPTS
+    }
+  }
+
+  return(prach_mask);
+}
+
diff --git a/common/utils/lte/prach_utils.h b/common/utils/lte/prach_utils.h
new file mode 100644
index 0000000000..995805fbd2
--- /dev/null
+++ b/common/utils/lte/prach_utils.h
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file common/utils/prach_utils.h
+* \brief computation of some PRACH variables used in both MAC and PHY 
+* \author R. Knopp
+* \date 2020
+* \version 0.1
+* \company Eurecom
+* \email: raymond.knopp@eurecom.fr, florian.kaltenberger@eurecom.fr, oscar.tonelli@yahoo.it
+* \note
+* \warning
+*/
+uint8_t get_prach_fmt(int prach_ConfigIndex,int frame_type);
+
+uint8_t get_prach_prb_offset(int frame_type,
+                             int tdd_config,
+                             int N_RB_UL,
+                             uint8_t prach_ConfigIndex,
+                             uint8_t n_ra_prboffset,
+                             uint8_t tdd_mapindex, uint16_t Nf);
+int is_prach_subframe0(int tdd_config,int frame_type,uint8_t prach_ConfigIndex,uint32_t frame, uint8_t subframe);