test_rrc_rcv.c

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

/***************************************************************************
              test_rrc_rcv.c  -  Tests the inverse rrc
                            -------------------
    begin                : 03/08/08 
    authors              : Selvavinayagam Gunabalan
    emails               : [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 03/08/08 - Selva - Begin
 04/03/03 - ineiti - added a small description
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/


char desc[] =
"Description:\n"
"The old hardware took real samples in passband and returned also\n"
"real samples in passband. In order to go to the more convenient\n"
"complex samples, we introduced the rrc_inv, that does nothing else than\n"
"inverse the rrc-funtion, that went from a complex baseband signal to\n"
"a real passband signal.\n"
"The output should be the test-phrase\n\n";

#include "spc.h"
#include "std.h"

#define DBG_LVL 0


struct chain_t *test_chain;

void *start_it( void *arg ) {

  swr_sdb_id src,snk,block,ch;

  test_chain = swr_chain_create(NEW_SPC_VAR( "source", src ),
                                NEW_SPC( "mapper"),
                                NEW_SPC( "rrc" ),
                                NEW_SPC_VAR( "block", block),
                                NEW_SPC_VAR( "rrc_rcv",ch ),
                                NEW_SPC( "slicer" ),
                                NEW_SPC_VAR( "sink", snk ),
                                CHAIN_END );

  swr_sdb_set_config_double( block, "sigma", 0 );
  swr_sdb_set_config_int( block, "size", 4096);
  swr_sdb_set_config_int( snk, "flag", 1 ); //dump


  swr_sdb_send_msg( src, SUBS_MSG_USER, NULL, -1 );
  swr_sdb_send_msg( src, SUBS_MSG_USER, NULL, -1 );
  swr_sdb_send_msg( src, SUBS_MSG_USER, NULL, -1 );

  return 0;
}

swr_spc_id_t spm_id;

struct thread start;
/**
 * This function is called upon "insmod" and is used to register the
 * different parts of the module to the SPM.
 */
int um_module_init(void) {

  PR_CL( desc );
  test_chain = NULL;
  if ( swr_thread_init( &start, start_it, NULL ) < 0 )
    goto first_no_stack;
  return 0;

first_no_stack:
  PR_DBG( 0, "Couldn't allocate stack\n" );
  return -1;
}

void um_module_exit( void ) {
  swr_thread_free( &start, NULL );
  swr_chain_destroy( test_chain );
}


module_init( um_module_init );
module_exit( um_module_exit );