pilot_randomizer.c

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

/*****************************************************************************/
/*   FIle Name : pilot_randomizer.c                                          */
/*   Description : WLAN pilot randomizer for  OFDM Encoder/Decoder           */
/*                 S(x) = x^7 + x^4 + 1 ;                                    */
/*   author : miffie                                                         */
/*   Date   : aug/10/05                                                      */
/*   Copyright (c) 2005 miffie   All rights reserved.                        */
/*****************************************************************************/
char  pilot_randomizer (char seed) {
int 	ii ;
char 	shifter ;
char 	tmp1 ;

  //Main 
    shifter = seed ;
    tmp1 = (shifter &0x40) >> 6 ; 
    tmp1 ^= (shifter &0x08) >> 3 ; 
    shifter = (shifter<<1) + tmp1 ;
    return ( shifter ) ;

} //pilot_randomizer