sim_qam.h

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// Copyright(c) 1993-1996 Tony Kirke
/*
 * SPUC - Signal processing using C++ - A DSP library
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <complex.h>
#include <max_pn.h>     
#include <noise.h>     
#include <vco.h>
#include <fading_channel.h>
#include <fir_interp.h>
#include <lagrange.h>
//#include "qam_demap.h"
#include "qam_tx.h"
#include "base_demod.h"
namespace SPUC {




class sim_qam {
        public:
  
        qam_tx TX;
        noise* n;
        base_demod* DUT;
        vco* freq_offset;
        fir<complex<double> > rx_filter;
        lagrange<complex<double> > interp;
        double var;
        double snr;
        double channel_pwr;
        complex<double> tx_data; 
        complex<long> data; 
        long output_delay; // Equalizer output delay (for paths to merge)
        long rate;

        bool enable_freq_offset;
        bool enable_time_offset;
        double carrier_offset_rate;
        double time_inc;
        double time_offset;


        complex<double> base; 
        complex<double> main; 
        complex<double> main1, base1;
        
        complex<double> b_noise;  // Noise
        long rcv_symbols;       // Number of symbols decoded
        long tx_symbols;       // Counter for transmitted symbols
        long count;                     // index of sample number at input rate
        double phase_inc;
        double phase_acc;
        const long over; // Oversampling rate
        double alpha;

        sim_qam(double tx_filter_bw=0.25);
        void loop_init(long rate, long conv_rate, 
                                   double carrier_off=0, double time_off=0);
        complex<long> step();
        ~sim_qam() {
                if (n) delete n;
        }
        void loop_end(void);
};                       
}

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