chest.c

来自「软件无线电的平台」· C语言 代码 · 共 107 行

/***************************************************************************
 *    chest.c  -  Channel Estimation
 *                           -------------------
 *   begin                :  2003
 *   authors              :  selvan
 *   emails               :  email address
 ***************************************************************************/

/***************************************************************************
 *                                Changes
 *                                -------
 * date - name - description
 * 03/08/. - selvan - start
 * 04/03/06 - ineiti - adjusted 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.                                   *
 *                                                                         *
 ***************************************************************************/


/**
 * Channel knowledge is necessary for the detection of symbols in a MIMO
 * receiver. Knowledge of channel is gained by sending a known training
 * sequence. This traininig sequence satisfies certain desired properties
 * as given by 1) Jaiganesh Balakrishnan, Markus Rupp, Harish Viswanthan
 * 'Optimal Training for Multiple Antenna Systems' 2)C.Fragouli, N. Al-Dhahir,
 * W. Turin 'Training based channel estimation for Multiple Antenna Brodband
 * Transmissions'. Please refer to them for more technical details.
 */


#include "spc.h"
//#include "sequences.h"

#define DBG_LVL 4


int rcv_mimo_module_init( void );
void rcv_mimo_module_exit( void );

int ics_rcv_module_init( void );
void ics_rcv_module_exit( void );

int rcv_module_init( void );
void rcv_module_exit( void );

int send_module_init( void );
void send_module_exit( void );


/*
 * Just call the two init-functions
 */
int spc_module_init(void) {

  if( rcv_module_init() < 0 ) {
    PR_DBG( 0, "Couldn't init rcv-part\n" );
    return -1;
  }

  if ( send_module_init() < 0 ) {
    rcv_module_exit();
    PR_DBG( 0, "Couldn't init send-part\n" );
    return -1;
  }
  
  if ( ics_rcv_module_init() < 0 ) {
    rcv_module_exit();
    send_module_exit();
    PR_DBG( 0, "Couldn't init ics_rcv-part\n" );
    return -1;
  }
  
  if ( rcv_mimo_module_init() < 0 ) {
    rcv_module_exit();
    send_module_exit();
    ics_rcv_module_exit();
    PR_DBG( 0, "Couldn't init rcv_mimo-part\n" );
    return -1;
  }
  
  return 0;
}


/*
 * And call the two exit-funcitons
 */
void spc_module_exit( void ) {

  rcv_mimo_module_exit();
  ics_rcv_module_exit();
  rcv_module_exit();
  send_module_exit();
}


module_init( spc_module_init );
module_exit( spc_module_exit );