--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/layer1/gtt_include/ctm/viterbi.h	Sun Jul 15 04:39:26 2018 +0000
@@ -0,0 +1,88 @@
+/*
+*******************************************************************************
+*
+*      COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
+*
+*      The program(s) may be used and/or copied only with the
+*      written permission from Ericsson or in accordance
+*      with the terms and conditions stipulated in the agreement or
+*      contract under which the program(s) have been supplied.
+*
+*******************************************************************************
+*
+*      File             : viterbi.h
+*      Purpose          : Header file for viterbi.c
+*      Author           : Francisco Javier Gil Gomez
+*
+*      Revision history
+*
+*      $Log: $
+*
+*******************************************************************************
+*/
+
+#ifndef viterbi_h
+#define viterbi_h "$Id: $"
+
+#include <stdio.h>
+#include <math.h>
+
+#include "conv_poly.h"   /* definition of viterbi_t */
+
+
+/***********************************************************************/
+/* viterbi_init()                                                      */
+/* **************                                                      */
+/* Initialization of the Viterbi decoder.                              */
+/*                                                                     */
+/* output variables:                                                   */
+/* *viterbi_state   initialized state variable of the decoder          */
+/*                                                                     */
+/***********************************************************************/
+
+void viterbi_init(viterbi_t* viterbi_state);
+
+
+/***********************************************************************/
+/* viterbi_reinit()                                                    */
+/* ****************                                                    */
+/* Re-Initialization of the Viterbi decoder. This function should be   */
+/* used for re-setting a Viterbi decoder that has already been         */
+/* initialized. In contrast to viterbi_init(), this reinit function    */
+/* does not calculate the values of all members of viterbi_state that  */
+/* do not change during the execution of the Viterbi algorithm.        */
+/*                                                                     */
+/* output variables:                                                   */
+/* *viterbi_state   initialized state variable of the decoder          */
+/*                                                                     */
+/***********************************************************************/
+
+void viterbi_reinit(viterbi_t* viterbi_state);
+
+
+/***********************************************************************/
+/* viterbi_exec()                                                      */
+/* **************                                                      */
+/* Execution of the Viterbi decoder                                    */
+/*                                                                     */
+/* input variables:                                                    */
+/* inputword            Vector with gross bits                         */
+/* length_input         Number of valid gross bits in vector inputword.*/
+/*                      length_input must be an integer multiple of    */
+/*                      CHC_RATE                                       */
+/*                                                                     */
+/* output variables:                                                   */
+/* out                  Vector with the decoded net bits. The net bits */
+/*                      are either 0 or 1.                             */
+/* *num_valid_out_bits  Number of valid bits in vector out             */
+/*                                                                     */
+/* input/output variables:                                             */
+/* *viterbi_state       State variable of the decoder                  */
+/*                                                                     */
+/***********************************************************************/
+
+void viterbi_exec(WORD16*  inputword, WORD16  length_input, 
+                  WORD16*  out,       WORD16* num_valid_out_bits,
+                  viterbi_t* viterbi_state);
+
+#endif