C++ (Cpp) v22bis_rx_symbol_timing_correction Examples

Example #1

static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol)
{
    int i;
    int len;
    complexf_t *coeffs;
    float fpower;
    struct qam_report_control_s *s;

    s = (struct qam_report_control_s *) user_data;
    if (constel)
    {
#if defined(ENABLE_GUI)
        if (use_gui)
        {
            qam_monitor_update_constel(s->qam_monitor, constel);
            qam_monitor_update_carrier_tracking(s->qam_monitor, v22bis_rx_carrier_frequency(s->s));
            qam_monitor_update_symbol_tracking(s->qam_monitor, v22bis_rx_symbol_timing_correction(s->s));
        }
#endif
        fpower = (constel->re - target->re)*(constel->re - target->re)
               + (constel->im - target->im)*(constel->im - target->im);
        s->smooth_power = 0.95*s->smooth_power + 0.05*fpower;
        printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %8.4f %8.4f\n", s->symbol_no, constel->re, constel->im, target->re, target->im, fpower, s->smooth_power);
        s->symbol_no++;
    }
    else
    {
        printf("Gardner step %d\n", symbol);
        len = v22bis_rx_equalizer_state(s->s, &coeffs);
        printf("Equalizer A:\n");
        for (i = 0;  i < len;  i++)
            printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
#if defined(ENABLE_GUI)
        if (use_gui)
            qam_monitor_update_equalizer(s->qam_monitor, coeffs, len);
#endif
    }
}

Example #2

File: v22bis_tests.c Project: DastanIqbal/FreeSWITCH

static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol)
#endif
{
    int i;
    int len;
#if defined(SPANDSP_USE_FIXED_POINT)
    complexi16_t *coeffs;
#else
    complexf_t *coeffs;
#endif
    complexf_t constel_point;
    complexf_t target_point;
    float fpower;
    endpoint_t *s;

    s = (endpoint_t *) user_data;
    if (constel)
    {
        constel_point.re = constel->re/V22BIS_CONSTELLATION_SCALING_FACTOR;
        constel_point.im = constel->im/V22BIS_CONSTELLATION_SCALING_FACTOR;
        target_point.re = target->re/V22BIS_CONSTELLATION_SCALING_FACTOR;
        target_point.im = target->im/V22BIS_CONSTELLATION_SCALING_FACTOR;
#if defined(ENABLE_GUI)
        if (use_gui)
        {
            qam_monitor_update_constel(s->qam_monitor, &constel_point);
            qam_monitor_update_carrier_tracking(s->qam_monitor, v22bis_rx_carrier_frequency(s->v22bis));
            qam_monitor_update_symbol_tracking(s->qam_monitor, v22bis_rx_symbol_timing_correction(s->v22bis));
        }
#endif
        fpower = (constel->re - target->re)*(constel->re - target->re)
               + (constel->im - target->im)*(constel->im - target->im);
        s->smooth_power = 0.95f*s->smooth_power + 0.05f*fpower;

        printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %2x %8.4f %8.4f %8.4f\n",
               s->symbol_no,
               constel_point.re,
               constel_point.im,
               target_point.re,
               target_point.im,
               symbol,
               fpower,
               s->smooth_power,
               v22bis_rx_signal_power(s->v22bis));
        s->symbol_no++;
    }
    else
    {
        printf("Gardner step %d\n", symbol);
        if ((len = v22bis_rx_equalizer_state(s->v22bis, &coeffs)))
        {
            printf("Equalizer A:\n");
            for (i = 0;  i < len;  i++)
#if defined(SPANDSP_USE_FIXED_POINT)
                printf("%3d (%15.5f, %15.5f)\n", i, coeffs[i].re/V22BIS_CONSTELLATION_SCALING_FACTOR, coeffs[i].im/V22BIS_CONSTELLATION_SCALING_FACTOR);
#else
                printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
#endif
#if defined(ENABLE_GUI)
            if (use_gui)
            {
#if defined(SPANDSP_USE_FIXED_POINT)
                qam_monitor_update_int_equalizer(s->qam_monitor, coeffs, len);
#else
                qam_monitor_update_equalizer(s->qam_monitor, coeffs, len);
#endif
            }
#endif
        }
    }
}