conversions.c

来自「WCDMA的仿真程序,分别用C和MATLAB两种语言仿真」· C语言 代码 · 共 81 行

/*
 |
 | Copyright disclaimer:
 |   This software was developed at the National Institute of Standards
 |   and Technology by employees of the Federal Government in the course
 |   of their official duties. Pursuant to title 17 Section 105 of the
 |   United States Code this software is not subject to copyright
 |   protection and is in the public domain.
 |
 |   We would appreciate acknowledgement if the software is used.
 |
*/

/*
 | Project:	WCDMA simulation environment
 | Module:      Data type conversions
 | Author:      Tommi Makelainen, Nokia/NIST
 | Date:        January 5, 1999
 |
 | History:
 |              January 5, 1999 Tommi Makelainen
 |                      Initial version.
 |
 */

#include <stdio.h>
#include <math.h>


/*
 * Function:	bin2antipodal
 * Desc.:	Convert input data vector in binary (0,1) to
 *              antipodal (-1,1) output vector.
 *
 * Inputs:
 *   binary	input data bit vector in binary (0,1) form
 *   data_len	length of input data vector
 * Outputs:
 *   antipodal	output data vector in antipodal (-1,1) form
 *
 * Note:	
 */
int bin2antipodal(int binary[], int data_len, int antipodal[])
{ 
    int i;

    for (i=0; i < data_len; i++)
    {
        antipodal[i] = binary[i]*2 - 1;
    }

    return(0);
}

/*
 * Function:	antipodal2bin
 * Desc.:	Convert input data vector in antipodal (-1,1) to
 *              binary (0,1) output vector.
 *
 * Inputs:
 *   antipodal	input data bit vector in antipodal (-1,1) form
 *   data_len	length of input data vector
 * Outputs:
 *   binary	output data vector in binary (0,1) form
 *
 * Note:	
 */
int antipodal2bin(int antipodal[], int data_len, int binary[])
{ 
    int i;

    for (i=0; i < data_len; i++)
    {
        binary[i] = (antipodal[i] + 1) >> 1;
    }

    return(0);
}