ppdu_enc.c

This model is just testing an idea of MIMO, which IEEE802.11n will have. But I havo not seen the s

/*****************************************************************************/
/*   FIle Name : ppdu_enc.c                                                  */
/*   Description : WLAN PPDU encoder                                         */
/*   author : miffie                                                         */
/*   Date   : aug/12/05                                                      */
/*   Copyright (c) 2005 miffie   All rights reserved.                        */
/*****************************************************************************/

struct complexset ppdu_enc( struct binaryset datain , 
                            char RATE , short LENGTH ) { // 
int 	ii ;
struct  complexset cset0, cset1 , ctop ;
char 	pilot_shifter ;
char 	*tmp1 , *tmp2 ;

  //preamble
    ctop = preamble() ;

  //OFDM SIGNAL symbol
    pilot_shifter = 0x7f ;
    cset0 = signal_enc ( RATE, LENGTH , &pilot_shifter ) ; //RATE 36 Mhz, LENGTH
    //print_complexset( cset0 ) ;
    ctop = cat_complexset(ctop, cset0) ;

    //preamble & signal boundary
    ctop.data[320].realp = (ctop.data[320].realp + ctop.data[320-64].realp) /2 ;
    ctop.data[320].image = (ctop.data[320].image + ctop.data[320-64].image) /2 ;
 
  //OFDM DATA symbols
    cset1 = data_enc ( datain , RATE, LENGTH , pilot_shifter ) ; //RATE 36 Mhz, LENGTH
    ctop = cat_complexset(ctop, cset1) ;
 
    //signal & data boundary
    ctop.data[400].realp = (ctop.data[400].realp + ctop.data[400-64].realp) /2 ;
    ctop.data[400].image = (ctop.data[400].image + ctop.data[400-64].image) /2 ;

    return( ctop ) ;
} //ppdu_enc