/* | | 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);}