Example 01 - Basic Configuration File

This basic example generates a GPS signal, applies a low-pass filter with a single-sided cut-off frequency of 10.12 MHz and displays it in a window.

You can start it by running

cd snacs/trunk/release
./SNACS-release -f ../../examples/example_01/example_01.cfg 

/*
 *   Example configuration file for
 *
 *   SNACS - The Satellite Navigation Radio Channel Simulator
 *
 *   example_01.cfg
 *
 *   Simple demonstration of a SNACS configuration file, only
 *   GPS signal generation block, low-pass filter, and output window are included.
 *
 *   Copyright (C) 2010  F. M. Schubert
 *
 */

Simulation:
{
        sampling_frequency = 40e6; // Hz
        c0 = 2.99e8;
        length = 10.0; // s
        intermediate_frequency = 15e6; // Hz
        
        conc_buf_length = 0.001; // in s
        buffers_per_concbuf = 2;
        
        result_directory = "Result";
        append_date_to_outdir = true;

        SNBlocks = (

                {       Type = "snSignalGenerate";
                        start = 0.0;
                        signal = {
                                inphase = {
                                        code = "C/A";
                                        prn = 1;
                                        modulation = "BPSK(n)";
                                        n = 1.0;
                                        data_type = "none";
                                };
                        };      
                },

                {       Type = "snLowPassFilter";
                        coefficients_type = "remez";
                        order = 64;
                        cut_off_frequency = 10.23e6;
                },

                {       Type = "snSignalOutputWidget";
                                buffers_to_display = 1;
                }
        ); // end SNBlocks
}; // end Simulation

Plotting:
{
        UpdateInterval = 500; // ms
        PlotXSize = 1024L; // pixel to be plottet. format: long (L) 
        plot_buffer_length = 0.00001; // s 
};