test_channel.c

这是一个c＋＋编写的WCDMA链路采用RAKE接收的方针源代码

/*
 |
 | 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:      Tester for channel model functions.
 | Author:      Maarit Melvasalo
 | Date:        May 1999
 |
 | History:
 |              May 18,  1999 Maarit Melvasalo 
 |                      Tester for channel model.
 |      
 |
*/

#include <stdlib.h> 
#include <math.h>
#include <stdio.h>
#include "config_wcdma.h"
#include "channel.h"

#define INPUT_SIZE 20


/*
 * Channel configuration
 */
double channel_impulse[4] = { 0.1, 0.4, 0.2, 0.2 };
int    channel_delays[4]  = { 0, 1, 2, 3 };

/*
 * Input data for I and Q.
 */
int    Inputs[INPUT_SIZE] = {-1,-1, 1, 1,-1,-1, 1, 1,
                             -1,-1, 1, 1,-1,-1, 1, 1,
                             -1,-1, 1, 1 };
int    Qnputs[INPUT_SIZE] = { 1, 1,-1,-1, 1, 1,-1,-1,
                              1, 1,-1,-1, 1, 1,-1,-1,
                              1, 1,-1,-1 };

/*
 * Expected output vectors.
 */
double I_out_correct[20] = {-0.1,-0.5,-0.3, 0.3,-0.1,-0.5, 0.1, 0.5,
                            -0.1,-0.5, 0.1, 0.5,-0.1,-0.5, 0.1, 0.5,
                            -0.1,-0.5, 0.1, 0.5 };

double Q_out_correct[20] = { 0.1, 0.5, 0.3,-0.3, 0.1, 0.5,-0.1,-0.5,
                             0.1, 0.5,-0.1,-0.5, 0.1, 0.5,-0.1,-0.5,
                             0.1, 0.5,-0.1,-0.5 };

/*
 * Output tolerance.
 */
double tolerance = 0.00000001;


/* ------------------------------------------------------------------- */

int main(int argc, char *argv[])
{
    int nTaps = 4;
    int nImpulse = 1;
    double impulse_prob[1];
    int nFrames = 1;
    double esno = 16;
    double power = 0;
    int nInputs = INPUT_SIZE;
    double I_out[INPUT_SIZE], Q_out[INPUT_SIZE];
    int error_count = 0;
    int instance, i;

    instance = wcdma_channel_init(
                      channel_impulse, channel_delays,
                      nTaps, nImpulse, impulse_prob, 
                      nFrames, esno, power);
    
    wcdma_channel(Inputs, Qnputs, nInputs, instance,
                  channel_impulse, channel_delays, I_out, Q_out);

    /*
     * Compare channel output to the precalculated expected output.
     */
    for (i=0; i < INPUT_SIZE; i++) {
        if ( ( (I_out[i] - I_out_correct[i]) > tolerance ) ||
             ( (Q_out[i] - Q_out_correct[i]) > tolerance ) ) {
            error_count++;
        } /* if */
    } /* for */

    printf("\nFound total of %d conflicting chips.\n\n", error_count);

    exit(0);
}