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mix2.c
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// Copyright (c) <2012> <Leif Asbrink>
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction,
// including without limitation the rights to use, copy, modify,
// merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.
#include "globdef.h"
#include "uidef.h"
#include "fft1def.h"
#include "fft3def.h"
#include "sigdef.h"
#include "seldef.h"
#include "screendef.h"
#include "blnkdef.h"
#define ZZ 0.000000001
void detect_fm(void);
float mix2_phase=0;
void fft3_mix2(void)
{
int i, j, k, ia, ib, ic, id, ix, iy, pb, p0, sizhalf;
int last_point;
float latest_hold_max1;
int latest_hold_pos1;
float latest_hold_max2;
int latest_hold_pos2;
float ampfac,cg_mid;
float big;
int nn, mm;
int pa, resamp;
#define NOISE_FILTERS 2
#define NOISE_POINTS 5
float noise[2*NOISE_FILTERS];
float *carr;
float t1,t2,t3,t4,t5;
float r1,r2,c1,c2,c3;
float noise_floor, a2, b2, re, im;
float noi2, sina, a2s, b2s;
float sellim_correction, fac;
double dr3, dt1, dt2, dt3, dt4, dr4;
carr=&fft3_tmp[twice_rxchan*mix2.size];
resamp=fft3_size/mix2.size;
noise_floor=0;
sizhalf=mix2.size/2;
if(sw_onechan) {
nn=2*(mix2.size-1);
if(genparm[CW_DECODE_ENABLE] != 0) {
// Compute the power within several narrow filters near the passband.
// Get the average while excluding large values.
// This way occasional signals outside our filter will not
// be included in the noise floor.
mm=bg_flatpoints+2*bg_curvpoints+NOISE_SEP;
t3=BIGFLOAT;
for(k=0; k<NOISE_FILTERS; k++) {
t1=0;
t2=0;
for(i=0; i<NOISE_POINTS; i++) {
j=mm+i+k*(NOISE_POINTS+NOISE_SEP);
t1+=fft3_slowsum[fft3_size/2-bg_first_xpoint+j];
t2+=fft3_slowsum[fft3_size/2-bg_first_xpoint-j];
}
noise[2*k]=t1;
noise[2*k+1]=t2;
if(t1<t3)t3=t1;
if(t2<t3)t3=t2;
}
k=0;
t1=0;
t3*=1.5;
for(i=0; i<2*NOISE_FILTERS; i++) {
if(noise[i] < t3) {
t1+=noise[i];
k++;
}
}
noise_floor=t1/(k*NOISE_POINTS);
}
if(bg.mixer_mode == 1) {
// Filter and decimate in the frequency domain.
// Select mix2.size points centered at fft3_size/2, and move them
// to fft3_tmp while multiplying with the baseband filter function.
p0=fft3_px+fft3_size;
k=fft3_size/2;
for(i=0; i<sizhalf; i++) {
fft3_tmp[2*i ]=fft3[p0+2*i ]*bg_filterfunc[k+i];
fft3_tmp[2*i+1]=fft3[p0+2*i+1]*bg_filterfunc[k+i];
}
for(i=0; i<sizhalf; i++) {
fft3_tmp[nn-2*i ]=fft3[p0-2*i-2]*bg_filterfunc[k-i-1];
fft3_tmp[nn-2*i+1]=fft3[p0-2*i-1]*bg_filterfunc[k-i-1];
}
fftback(mix2.size, mix2.n, fft3_tmp, mix2.table, mix2.permute,
yieldflag_ndsp_mix2);
// Store baseb_raw as the time function we obtain from the back transformation.
if(genparm[THIRD_FFT_SINPOW] == 2) {
for(i=0; i<sizhalf; i++) {
baseb_raw[2*baseb_pa+2*i ]+=fft3_tmp[2*i];
baseb_raw[2*baseb_pa+2*i+1]+=fft3_tmp[2*i+1];
}
p0=(baseb_pa+sizhalf)&baseband_mask;
for(i=0; i<(int)mix2.size; i++) {
baseb_raw[2*p0+i]=fft3_tmp[mix2.size+i];
}
} else {
p0=baseb_pa;
k=mix2.interleave_points-2*(mix2.crossover_points/2);
j=k/2+mix2.crossover_points;
ia=2*mix2.crossover_points;
for(i=0; i<ia; i+=2) {
baseb_raw[2*p0 ]=baseb_raw[2*p0 ]*mix2.cos2win[i>>1]+fft3_tmp[i+k ]*mix2.sin2win[i>>1];
baseb_raw[2*p0+1]=baseb_raw[2*p0+1]*mix2.cos2win[i>>1]+fft3_tmp[i+k+1]*mix2.sin2win[i>>1];
p0=(p0+1)&baseband_mask;
}
ib=mix2.new_points+2+2*(mix2.crossover_points/2);
for(i=ia; i<ib; i+=2) {
baseb_raw[2*p0 ]=fft3_tmp[i+k ]*mix2.window[j];
baseb_raw[2*p0+1]=fft3_tmp[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
j++;
}
j--;
ic=2*mix2.new_points;
for(i=ib; i<ic; i+=2) {
j--;
baseb_raw[2*p0 ]=fft3_tmp[i+k ]*mix2.window[j];
baseb_raw[2*p0+1]=fft3_tmp[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
}
id=2*(mix2.crossover_points+mix2.new_points);
for(i=ic; i<id; i+=2) {
baseb_raw[2*p0 ]=fft3_tmp[i+k ];
baseb_raw[2*p0+1]=fft3_tmp[i+k+1];
p0=(p0+1)&baseband_mask;
}
}
}
if(bg.mixer_mode == 2) {
// Use a FIR filter
// We have valid data in timf3 up to (timf3_py+2*fft3_size-1)
// The length of the FIR is basebraw_fir_pts
// The last FIR starts at timf3_py+2*chan*(fft3_size-basebraw_fir_pts)
// The first transform starts at timf3_py+2*chan*(fft3_size-
// basebraw_fir_pts-fft3_new_points)
// The resampling rate is fft3_size/mix2.size
p0=baseb_pa;
for(k=1; k<=(int)mix2.new_points; k++) {
pa=(timf3_py+2*(1-basebraw_fir_pts+fft3_size-fft3_new_points+k*resamp)+
timf3_size)&timf3_mask;
mm=pa;
t1=timf3_float[pa ]*basebraw_fir[basebraw_fir_pts/2];
t2=timf3_float[pa+1]*basebraw_fir[basebraw_fir_pts/2];
if( (k&255) == 255)lir_sched_yield();
for(i=basebraw_fir_pts/2-1; i>=0; i--) {
pa=(pa+2)&timf3_mask;
mm=(mm-2+timf3_size)&timf3_mask;
t1+=(timf3_float[pa ]+timf3_float[mm ])*basebraw_fir[i];
t2+=(timf3_float[pa+1]+timf3_float[mm+1])*basebraw_fir[i];
}
baseb_raw[2*p0 ]=t1;
baseb_raw[2*p0+1]=t2;
p0=(p0+1)&baseband_mask;
}
}
if(fm_pilot_size == 0) {
// Select mix2.size points centered at fft3_size/2, and move them
// to carr while multiplying with a filter function that is
// bg.coh_factor times narrower than the baseband filter function
k=fft3_size/2;
for(i=0; i<sizhalf; i++) {
carr[2*i ]=fft3[fft3_px+fft3_size+2*i ]*bg_carrfilter[k+i];
carr[2*i+1]=fft3[fft3_px+fft3_size+2*i+1]*bg_carrfilter[k+i];
}
for(i=0; i<sizhalf; i++) {
carr[nn-2*i ]=fft3[fft3_px+fft3_size-2*i-2]*bg_carrfilter[k-i-1];
carr[nn-2*i+1]=fft3[fft3_px+fft3_size-2*i-1]*bg_carrfilter[k-i-1];
}
}
} else {
nn=4*(mix2.size-1);
// !!!!!!!!!!!!!! There are two rx channels. !!!!!!!!!!!!!!!!!!
if( genparm[CW_DECODE_ENABLE] != 0) {
// Compute the power within several narrow filters near the passband.
// Get the average while excluding large values.
// This way occasional signals outside our filter will not
// be included in the noise floor.
mm=bg_flatpoints+2*bg_curvpoints+NOISE_SEP;
t3=BIGFLOAT;
for(k=0; k<NOISE_FILTERS; k++) {
t1=0;
t2=0;
for(i=0; i<NOISE_POINTS; i++) {
j=mm+i+k*(NOISE_POINTS+NOISE_SEP);
t1+=fft3_slowsum[2*(fft3_size/2-bg_first_xpoint+j)];
t2+=fft3_slowsum[2*(fft3_size/2-bg_first_xpoint-j)];
}
noise[2*k]=t1;
noise[2*k+1]=t2;
if(t1<t3)t3=t1;
if(t2<t3)t3=t2;
}
k=0;
t1=0;
t3*=1.5;
for(i=0; i<2*NOISE_FILTERS; i++) {
if(noise[i] < t3) {
t1+=noise[i];
k++;
}
}
noise_floor=t1/(k*NOISE_POINTS);
}
// Select mix2.size points centered at fft3_size/2, and move them
// to fft3_tmp while multiplying with the baseband filter function.
// Transform the polarization at the same time.
// We fill fft3_tmp even when the filter and decimation will be
// made in the time domain with a FIR filter in order to have
// the polarization computed here by use of the fft3 spectrum.
a2=0;
b2=0;
re=0;
im=0;
p0=fft3_px+2*fft3_size;
k=fft3_size/2;
for(i=0; i<sizhalf; i++) {
if(bg_filterfunc[k+i] == 0) {
fft3_tmp[4*i ]=0;
fft3_tmp[4*i+1]=0;
fft3_tmp[4*i+2]=0;
fft3_tmp[4*i+3]=0;
} else {
t1=fft3[p0+4*i ];
t2=fft3[p0+4*i+1];
t3=fft3[p0+4*i+2];
t4=fft3[p0+4*i+3];
fft3_tmp[4*i ]=(pg.c1*t1+pg.c2*t3+pg.c3*t4)*bg_filterfunc[k+i];
fft3_tmp[4*i+1]=(pg.c1*t2+pg.c2*t4-pg.c3*t3)*bg_filterfunc[k+i];
fft3_tmp[4*i+2]=(pg.c1*t3-pg.c2*t1+pg.c3*t2)*bg_filterfunc[k+i];
fft3_tmp[4*i+3]=(pg.c1*t4-pg.c2*t2-pg.c3*t1)*bg_filterfunc[k+i];
r1=P4SCALE*(fft3_slowsum[fft3_size-2*bg_first_xpoint+2*i]-noise_floor);
if(r1 > 0 && pg.adapt == 0) {
a2+=r1*(fft3_tmp[4*i ]*fft3_tmp[4*i ]+
fft3_tmp[4*i+1]*fft3_tmp[4*i+1]);
b2+=r1*(fft3_tmp[4*i+2]*fft3_tmp[4*i+2]+
fft3_tmp[4*i+3]*fft3_tmp[4*i+3]);
re+=r1*(fft3_tmp[4*i ]*fft3_tmp[4*i+2]+
fft3_tmp[4*i+1]*fft3_tmp[4*i+3]);
im+=r1*(-fft3_tmp[4*i ]*fft3_tmp[4*i+3]+
fft3_tmp[4*i+1]*fft3_tmp[4*i+2]);
}
}
}
for(i=0; i<sizhalf; i++) {
if(bg_filterfunc[k-i-1] == 0) {
fft3_tmp[nn-4*i ]=0;
fft3_tmp[nn-4*i+1]=0;
fft3_tmp[nn-4*i+2]=0;
fft3_tmp[nn-4*i+3]=0;
} else {
t1=fft3[p0-4*i-4];
t2=fft3[p0-4*i-3];
t3=fft3[p0-4*i-2];
t4=fft3[p0-4*i-1];
fft3_tmp[nn-4*i ]=(pg.c1*t1+pg.c2*t3+pg.c3*t4)*bg_filterfunc[k-i-1];
fft3_tmp[nn-4*i+1]=(pg.c1*t2+pg.c2*t4-pg.c3*t3)*bg_filterfunc[k-i-1];
fft3_tmp[nn-4*i+2]=(pg.c1*t3-pg.c2*t1+pg.c3*t2)*bg_filterfunc[k-i-1];
fft3_tmp[nn-4*i+3]=(pg.c1*t4-pg.c2*t2-pg.c3*t1)*bg_filterfunc[k-i-1];
r1=P4SCALE*(fft3_slowsum[fft3_size-2*bg_first_xpoint-2*i]-noise_floor);
if(r1 > 0 && pg.adapt == 0) {
a2+=r1*(fft3_tmp[nn-4*i ]*fft3_tmp[nn-4*i ]+
fft3_tmp[nn-4*i+1]*fft3_tmp[nn-4*i+1]);
b2+=r1*(fft3_tmp[nn-4*i+2]*fft3_tmp[nn-4*i+2]+
fft3_tmp[nn-4*i+3]*fft3_tmp[nn-4*i+3]);
re+=r1*(fft3_tmp[nn-4*i ]*fft3_tmp[nn-4*i+2]+
fft3_tmp[nn-4*i+1]*fft3_tmp[nn-4*i+3]);
im+=r1*(-fft3_tmp[nn-4*i ]*fft3_tmp[nn-4*i+3]+
fft3_tmp[nn-4*i+1]*fft3_tmp[nn-4*i+2]);
}
}
}
// In case the polarization is already correct, a2 is large because
// it is S+N while the other numbers are small, containing noise only.
// Now, to follow the polarization correctly for really weak
// signals do not just use the data as they come here.
// Store the result in poleval_data and adjust pol first when it
// is quite certain that a new set of coefficients is better.
if(pg.adapt != 0)goto good_poldata;
poleval_data[poleval_pointer].a2=a2;
poleval_data[poleval_pointer].b2=b2;
poleval_data[poleval_pointer].re=re;
poleval_data[poleval_pointer].im=im;
for(i=0; i<poleval_pointer; i++) {
a2+=poleval_data[i].a2;
b2+=poleval_data[i].b2;
re+=poleval_data[i].re;
im+=poleval_data[i].im;
}
poleval_pointer++;
if(poleval_pointer<POLEVAL_SIZE/5)goto good_poldata;
// Check afcsub.c or blank1 .c for an explanation how pol
// coefficients are calculated.
// If we shall change pol coefficients now, we must be sure that
// the phase angle between a and b is accurate.
// Step through the data and sum the square of the phase deviation.
// Note that the phase is two dimensional.
// The angle between polarization planes and the phase angle
// between voltages.
t1=a2+b2;
if(t1 == 0)goto bad_poldata;
a2/=t1;
b2/=t1;
re/=t1;
im/=t1;
r1=0;
r2=0;
for(i=0; i<poleval_pointer; i++) {
t1=poleval_data[i].a2+poleval_data[i].b2;
t2=re*t1;
t3=im*t1;
r1+=poleval_data[i].re*poleval_data[i].re+
poleval_data[i].im*poleval_data[i].im;
r2+=-(t2-poleval_data[i].re)*(t2-poleval_data[i].re)+
(t3-poleval_data[i].im)*(t3-poleval_data[i].im);
}
r2/=r1;
if(r2 >0.2)goto bad_poldata;
t2=re*re+im*im;
noi2=a2*b2-t2;
if(noi2 > 0.12)goto bad_poldata;
a2s=a2-noi2;
b2s=b2-noi2;
if(b2s <=0.0001 || t2 == 0) {
poleval_pointer=0;
if(b2 > a2) {
t1=atan2(pg.c2,pg.c3);
t2=pg.c1;
pg.c1=sqrt(pg.c2*pg.c2+pg.c3*pg.c3);
pg.c2=t2*cos(t1);
pg.c3=t2*sin(t1);
// The signs of c2 and c3 are most probably incorrect here!!! ööö
// but the situation is unusual and probably t2=0 always when
// b2=1 and a2=0. Check and make sure the new pol parameters give
// the orthogonal polarization.....
}
}
if(a2s > 0) {
c1=sqrt(a2s);
sina=sqrt(b2s);
c2=sina*re/sqrt(t2);
c3=-sina*im/sqrt(t2);
t1=sqrt(c1*c1+c2*c2+c3*c3);
if(c2 < 0)t1=-t1;
c1/=t1;
c2/=t1;
c3/=t1;
} else {
if(a2 > b2) {
c1=1;
c2=0;
} else {
c1=0;
c2=1;
}
c3=0;
}
// The current a and b signals were produced by:
// re_a=pg.c1*re_x+pg.c2*re_y+pg.c3*im_y (1)
// im_a=pg.c1*im_x+pg.c2*im_y-pg.c3*re_y (2)
// re_b=pg.c1*re_y-pg.c2*re_x+pg.c3*im_x (3)
// im_b=pg.c1*im_y-pg.c2*im_x-pg.c3*re_x (4)
// We have now found that improved a and b signals will be obtained from:
// new_re_a=c1*re_a+c2*re_b+c3*im_b (5)
// new_im_a=c1*im_a+c2*im_b-c3*re_b (6)
// new_re_b=c1*re_b-c2*re_a+c3*im_a (7)
// new_im_b=c1*im_b-c2*im_a-c3*re_a (8)
// Eliminate the old a and b signals
// new_re_a=c1*(pg.c1*re_x+pg.c2*re_y+pg.c3*im_y)
// +c2*(pg.c1*re_y-pg.c2*re_x+pg.c3*im_x)
// +c3*(pg.c1*im_y-pg.c2*im_x-pg.c3*re_x)
// new_re_a=c1*pg.c1*re_x+c1*pg.c2*re_y+c1*pg.c3*im_y
// +c2*pg.c1*re_y-c2*pg.c2*re_x+c2*pg.c3*im_x
// +c3*pg.c1*im_y-c3*pg.c2*im_x-c3*pg.c3*re_x
// new_re_a=(c1*pg.c1-c2*pg.c2-c3*pg.c3)*re_x
// -(c3*pg.c2-c2*pg.c3)*im_x
// +(c1*pg.c2+c2*pg.c1)*re_y
// +(c1*pg.c3+c3*pg.c1)*im_y
t1=c1*pg.c1-c2*pg.c2-c3*pg.c3;
t2=c3*pg.c2-c2*pg.c3;
t3=c1*pg.c2+c2*pg.c1;
t4=c1*pg.c3+c3*pg.c1;
// We want t2 to be zero so we adjust the phase.
c1=sqrt(t1*t1+t2*t2);
r2=sqrt(t3*t3+t4*t4);
r1=atan2(t3,t4)+atan2(t1,t2);
c2=-r2*cos(r1);
c3=r2*sin(r1);
t1=sqrt(c1*c1+c2*c2+c3*c3);
if(t1 > 0) {
t2=c1*pg.c1+c2*pg.c2+c3*pg.c3;
if(t2 < 0)t1=-t1;
c1/=t1;
c2/=t1;
c3/=t1;
t1=pg.avg-1;
pg.c1=(t1*pg.c1+c1)/pg.avg;
pg.c2=(t1*pg.c2+c2)/pg.avg;
pg.c3=(t1*pg.c3+c3)/pg.avg;
t1=sqrt(pg.c1*pg.c1+pg.c2*pg.c2+pg.c3*pg.c3);
if(pg.c2 < 0)t1=-t1;
pg.c1/=t1;
pg.c2/=t1;
pg.c3/=t1;
if(recent_time-show_pol_time > 0.1) {
sc[SC_SHOW_POL]++;
show_pol_time=current_time();
}
}
poleval_pointer=0;
goto good_poldata;
bad_poldata:
;
if(poleval_pointer > 3*POLEVAL_SIZE/4) {
j=poleval_pointer;
k=POLEVAL_SIZE/4;
poleval_pointer=0;
for(i=k; i<j; i++) {
poleval_data[poleval_pointer].a2=poleval_data[poleval_pointer+k].a2;
poleval_data[poleval_pointer].b2=poleval_data[poleval_pointer+k].b2;
poleval_data[poleval_pointer].re=poleval_data[poleval_pointer+k].re;
poleval_data[poleval_pointer].im=poleval_data[poleval_pointer+k].im;
poleval_pointer++;
}
}
good_poldata:
;
// Select mix2.size points centered at fft3_size/2, and move them
// to fft3_tmp while multiplying with a filter function that is
// bg.coh_factor times narrower than the baseband filter function
// Just process the first polarization.
// The user is responsible for the polarization to be right!
if(fm_pilot_size == 0) {
nn=2*(mix2.size-1);
k=fft3_size/2;
p0=fft3_px+2*fft3_size;
for(i=0; i<sizhalf; i++) {
carr[2*i ]=fft3[p0+4*i ]*bg_carrfilter[k+i];
carr[2*i+1]=fft3[p0+4*i+1]*bg_carrfilter[k+i];
}
for(i=0; i<sizhalf; i++) {
carr[nn-2*i ]=fft3[p0+2*nn-4*i ]*bg_carrfilter[k-i-1];
carr[nn-2*i+1]=fft3[p0+2*nn-4*i+1]*bg_carrfilter[k-i-1];
}
}
if(bg.mixer_mode == 1) {
dual_fftback(mix2.size, mix2.n, fft3_tmp,
mix2.table, mix2.permute, yieldflag_ndsp_mix2);
// Store baseb_raw and baseb_raw_orthog.
if(genparm[THIRD_FFT_SINPOW] == 2) {
for(i=0; i<sizhalf; i++) {
baseb_raw[2*baseb_pa+2*i ]+=fft3_tmp[4*i ];
baseb_raw[2*baseb_pa+2*i+1]+=fft3_tmp[4*i+1];
baseb_raw_orthog[2*baseb_pa+2*i ]+=fft3_tmp[4*i+2];
baseb_raw_orthog[2*baseb_pa+2*i+1]+=fft3_tmp[4*i+3];
}
k=sizhalf;
p0=(baseb_pa+sizhalf)&baseband_mask;
for(i=0; i<sizhalf; i++) {
baseb_raw[2*p0+2*i ]=fft3_tmp[4*(i+k) ];
baseb_raw[2*p0+2*i+1]=fft3_tmp[4*(i+k)+1];
baseb_raw_orthog[2*p0+2*i ]=fft3_tmp[4*(i+k)+2];
baseb_raw_orthog[2*p0+2*i+1]=fft3_tmp[4*(i+k)+3];
}
} else {
p0=baseb_pa;
k=mix2.interleave_points-2*(mix2.crossover_points/2);
j=k/2+mix2.crossover_points;
k*=2;
ia=2*mix2.crossover_points;
for(i=0; i<ia; i+=2) {
baseb_raw[2*p0 ]=baseb_raw[2*p0 ]*mix2.cos2win[i>>1]+fft3_tmp[2*i+k ]*mix2.sin2win[i>>1];
baseb_raw[2*p0+1]=baseb_raw[2*p0+1]*mix2.cos2win[i>>1]+fft3_tmp[2*i+k+1]*mix2.sin2win[i>>1];
baseb_raw_orthog[2*p0 ]=baseb_raw_orthog[2*p0 ]*mix2.cos2win[i>>1]+
fft3_tmp[2*i+k+2]*mix2.sin2win[i>>1];
baseb_raw_orthog[2*p0+1]=baseb_raw_orthog[2*p0+1]*mix2.cos2win[i>>1]+
fft3_tmp[2*i+k+3]*mix2.sin2win[i>>1];
p0=(p0+1)&baseband_mask;
}
ib=mix2.new_points+2+2*(mix2.crossover_points/2);
for(i=ia; i<ib; i+=2) {
baseb_raw[2*p0 ]=fft3_tmp[2*i+k ]*mix2.window[j];
baseb_raw[2*p0+1]=fft3_tmp[2*i+k+1]*mix2.window[j];
baseb_raw_orthog[2*p0 ]=fft3_tmp[2*i+k+2]*mix2.window[j];
baseb_raw_orthog[2*p0+1]=fft3_tmp[2*i+k+3]*mix2.window[j];
p0=(p0+1)&baseband_mask;
j++;
}
j--;
ic=2*mix2.new_points;
for(i=ib; i<ic; i+=2) {
j--;
baseb_raw[2*p0 ]=fft3_tmp[2*i+k ]*mix2.window[j];
baseb_raw[2*p0+1]=fft3_tmp[2*i+k+1]*mix2.window[j];
baseb_raw_orthog[2*p0 ]=fft3_tmp[2*i+k+2]*mix2.window[j];
baseb_raw_orthog[2*p0+1]=fft3_tmp[2*i+k+3]*mix2.window[j];
p0=(p0+1)&baseband_mask;
}
id=2*(mix2.crossover_points+mix2.new_points);
for(i=ic; i<id; i+=2) {
baseb_raw[2*p0 ]=fft3_tmp[2*i+k ];
baseb_raw[2*p0+1]=fft3_tmp[2*i+k+1];
baseb_raw_orthog[2*p0 ]=fft3_tmp[2*i+k+2];
baseb_raw_orthog[2*p0+1]=fft3_tmp[2*i+k+3];
p0=(p0+1)&baseband_mask;
}
}
}
if(bg.mixer_mode == 2) {
// Use a FIR filter
// We have valid data in timf3 up to (timf3_py+2*fft3_size-1)
// The length of the FIR is basebraw_fir_pts
// The last FIR starts at timf3_py+2*chan*(fft3_size-basebraw_fir_pts)
// The first transform starts at timf3_py+2*chan*(fft3_size-
// basebraw_fir_pts-fft3_new_points)
// The resampling rate is fft3_size/mix2.size
p0=baseb_pa;
for(k=1; k<=(int)mix2.new_points; k++) {
pa=(timf3_py+4*(1-basebraw_fir_pts+fft3_size-fft3_new_points+k*resamp)
+timf3_size)&timf3_mask;
mm=pa;
t1=timf3_float[pa ]*basebraw_fir[basebraw_fir_pts/2];
t2=timf3_float[pa+1]*basebraw_fir[basebraw_fir_pts/2];
t3=timf3_float[pa+2]*basebraw_fir[basebraw_fir_pts/2];
t4=timf3_float[pa+3]*basebraw_fir[basebraw_fir_pts/2];
if( (k&127) == 127)lir_sched_yield();
for(i=basebraw_fir_pts/2-1; i>=0; i--) {
pa=(pa+4)&timf3_mask;
mm=(mm-4+timf3_size)&timf3_mask;
t1+=(timf3_float[pa ]+timf3_float[mm ])*basebraw_fir[i];
t2+=(timf3_float[pa+1]+timf3_float[mm+1])*basebraw_fir[i];
t3+=(timf3_float[pa+2]+timf3_float[mm+2])*basebraw_fir[i];
t4+=(timf3_float[pa+3]+timf3_float[mm+3])*basebraw_fir[i];
}
baseb_raw[2*p0 ]=pg.c1*t1+pg.c2*t3+pg.c3*t4;
baseb_raw[2*p0+1]=pg.c1*t2+pg.c2*t4-pg.c3*t3;
baseb_raw_orthog[2*p0 ]=pg.c1*t3-pg.c2*t1+pg.c3*t2;
baseb_raw_orthog[2*p0+1]=pg.c1*t4-pg.c2*t2-pg.c3*t1;
p0=(p0+1)&baseband_mask;
}
}
}
if(fm_pilot_size == 0) {
if(bg.mixer_mode == 1) {
// Filter and decimate in the frequency domain.
// We already stored the selected part of the spectrum in carr.
// take the back transform and construct the time function
// of baseb_carrier
fftback(mix2.size, mix2.n, carr,mix2.table,mix2.permute,
yieldflag_ndsp_mix2);
// Store baseb_raw and baseb_carrier.
// Compute baseb, the product of the carrier and the signal.
if(genparm[THIRD_FFT_SINPOW] == 2) {
for(i=0; i<sizhalf; i++) {
baseb_carrier[2*baseb_pa+2*i ]+=carr[2*i ];
baseb_carrier[2*baseb_pa+2*i+1]+=carr[2*i+1];
}
p0=(baseb_pa+sizhalf)&baseband_mask;
k=mix2.size;
for(i=0; i<k; i++) {
baseb_carrier[2*p0+i]=carr[i+k];
}
} else {
p0=baseb_pa;
k=mix2.interleave_points-2*(mix2.crossover_points/2);
j=k/2+mix2.crossover_points;
ia=2*mix2.crossover_points;
for(i=0; i<ia; i+=2) {
baseb_carrier[2*p0 ]=baseb_carrier[2*p0 ]*mix2.cos2win[i>>1]+carr[i+k ]*mix2.sin2win[i>>1];
baseb_carrier[2*p0+1]=baseb_carrier[2*p0+1]*mix2.cos2win[i>>1]+carr[i+k+1]*mix2.sin2win[i>>1];
p0=(p0+1)&baseband_mask;
}
ib=mix2.new_points+2+2*(mix2.crossover_points/2);
for(i=ia; i<ib; i+=2) {
baseb_carrier[2*p0 ]=carr[i+k ]*mix2.window[j];
baseb_carrier[2*p0+1]=carr[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
j++;
}
j--;
ic=2*mix2.new_points;
for(i=ib; i<ic; i+=2) {
j--;
baseb_carrier[2*p0 ]=carr[i+k ]*mix2.window[j];
baseb_carrier[2*p0+1]=carr[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
}
id=2*(mix2.crossover_points+mix2.new_points);
for(i=ic; i<id; i+=2) {
baseb_carrier[2*p0 ]=carr[i+k ];
baseb_carrier[2*p0+1]=carr[i+k+1];
p0=(p0+1)&baseband_mask;
}
}
}
if(bg.mixer_mode == 2) {
// Filter and decimate in the frequency domain.
// Use a FIR filter
// We have valid data in timf3 up to (timf3_py+2*fft3_size-1)
// The length of the FIR is basebcarr_fir_pts
// The last FIR starts at timf3_py+2*chan*(fft3_size-basebcarr_fir_pts)
// The first transform starts at timf3_py+2*chan*(fft3_size-
// basebcarr_fir_pts-fft3_new_points)
// The resampling rate is fft3_size/mix2.size
p0=baseb_pa;
if(sw_onechan) {
for(k=1; k<=(int)mix2.new_points; k++) {
pa=(timf3_py+2*(1-basebcarr_fir_pts+fft3_size-fft3_new_points+k*resamp)+timf3_size)&timf3_mask;
mm=pa;
t1=timf3_float[pa ]*basebcarr_fir[basebcarr_fir_pts/2];
t2=timf3_float[pa+1]*basebcarr_fir[basebcarr_fir_pts/2];
if( (k&255) == 255)lir_sched_yield();
for(i=basebcarr_fir_pts/2-1; i>=0; i--) {
pa=(pa+2)&timf3_mask;
mm=(mm-2+timf3_size)&timf3_mask;
t1+=(timf3_float[pa ]+timf3_float[mm ])*basebcarr_fir[i];
t2+=(timf3_float[pa+1]+timf3_float[mm+1])*basebcarr_fir[i];
}
baseb_carrier[2*p0 ]=t1;
baseb_carrier[2*p0+1]=t2;
p0=(p0+1)&baseband_mask;
}
} else {
for(k=1; k<=(int)mix2.new_points; k++) {
pa=(timf3_py+4*(1-basebcarr_fir_pts+fft3_size-fft3_new_points+k*resamp)+timf3_size)&timf3_mask;
mm=pa;
t1=timf3_float[pa ]*basebcarr_fir[basebcarr_fir_pts/2];
t2=timf3_float[pa+1]*basebcarr_fir[basebcarr_fir_pts/2];
t3=timf3_float[pa+2]*basebcarr_fir[basebcarr_fir_pts/2];
t4=timf3_float[pa+3]*basebcarr_fir[basebcarr_fir_pts/2];
if( (k&127) == 127)lir_sched_yield();
for(i=basebcarr_fir_pts/2-1; i>=0; i--) {
pa=(pa+4)&timf3_mask;
mm=(mm-4+timf3_size)&timf3_mask;
t1+=(timf3_float[pa ]+timf3_float[mm ])*basebcarr_fir[i];
t2+=(timf3_float[pa+1]+timf3_float[mm+1])*basebcarr_fir[i];
t3+=(timf3_float[pa+2]+timf3_float[mm+2])*basebcarr_fir[i];
t4+=(timf3_float[pa+3]+timf3_float[mm+3])*basebcarr_fir[i];
}
baseb_carrier[2*p0 ]=pg.c1*t1+pg.c2*t3+pg.c3*t4;
baseb_carrier[2*p0+1]=pg.c1*t2+pg.c2*t4-pg.c3*t3;
p0=(p0+1)&baseband_mask;
}
}
}
}
if(genparm[CW_DECODE_ENABLE] != 0) {
// We want cw decoding. Compute baseb_wb_raw, a signal with a bandwidth
// that is at least two times bigger than the bandwidth of the
// filtered signal. (see computation of baseband_sampling_speed in
// baseb_graph.c)
if(sw_onechan) {
for(i=0; i<sizhalf; i++) {
fft3_tmp[2*i ]=fft3[fft3_px+fft3_size+2*i ];
fft3_tmp[2*i+1]=fft3[fft3_px+fft3_size+2*i+1];
}
nn=2*(mix2.size-1);
for(i=0; i<sizhalf; i++) {
fft3_tmp[nn-2*i ]=fft3[fft3_px+fft3_size-2*i-2];
fft3_tmp[nn-2*i+1]=fft3[fft3_px+fft3_size-2*i-1];
}
} else {
// !!!!!!!!!!!!!! There are two rx channels. !!!!!!!!!!!!!!!!!!
// Select mix2.size points centered at fft3_size/2, and move them
// to fft3_tmp. Transform the polarization at the same time.
for(i=0; i<sizhalf; i++) {
fft3_tmp[2*i ]=pg.c1*fft3[fft3_px+2*fft3_size+4*i ]+
pg.c2*fft3[fft3_px+2*fft3_size+4*i+2]+
pg.c3*fft3[fft3_px+2*fft3_size+4*i+3];
fft3_tmp[2*i+1]=pg.c1*fft3[fft3_px+2*fft3_size+4*i+1]+
pg.c2*fft3[fft3_px+2*fft3_size+4*i+3]-
pg.c3*fft3[fft3_px+2*fft3_size+4*i+2];
}
nn=2*(mix2.size-1);
for(i=0; i<sizhalf; i++) {
fft3_tmp[nn-2*i ]=pg.c1*fft3[fft3_px+2*fft3_size-4*i-4]+
pg.c2*fft3[fft3_px+2*fft3_size-4*i-2]+
pg.c3*fft3[fft3_px+2*fft3_size-4*i-1];
fft3_tmp[nn-2*i+1]=pg.c1*fft3[fft3_px+2*fft3_size-4*i-3]+
pg.c2*fft3[fft3_px+2*fft3_size-4*i-1]-
pg.c3*fft3[fft3_px+2*fft3_size-4*i-2];
}
}
fftback(mix2.size, mix2.n, fft3_tmp,
mix2.table, mix2.permute, yieldflag_ndsp_mix2);
// Store baseb_wb_raw
if(genparm[THIRD_FFT_SINPOW] == 2) {
for(i=0; i<sizhalf; i++) {
baseb_wb_raw[2*baseb_pa+2*i ]+=fft3_tmp[2*i ];
baseb_wb_raw[2*baseb_pa+2*i+1]+=fft3_tmp[2*i+1];
}
k=sizhalf;
p0=(baseb_pa+sizhalf)&baseband_mask;
for(i=0; i<sizhalf; i++) {
baseb_wb_raw[2*p0+2*i ]=fft3_tmp[2*(i+k) ];
baseb_wb_raw[2*p0+2*i+1]=fft3_tmp[2*(i+k)+1];
}
} else {
p0=baseb_pa;
k=mix2.interleave_points-2*(mix2.crossover_points/2);
j=k/2+mix2.crossover_points;
ia=2*mix2.crossover_points;
for(i=0; i<ia; i+=2) {
baseb_wb_raw[2*p0 ]=baseb_wb_raw[2*p0 ]*mix2.cos2win[i>>1]+fft3_tmp[i+k ]*mix2.sin2win[i>>1];
baseb_wb_raw[2*p0+1]=baseb_wb_raw[2*p0+1]*mix2.cos2win[i>>1]+fft3_tmp[i+k+1]*mix2.sin2win[i>>1];
p0=(p0+1)&baseband_mask;
}
ib=mix2.new_points+2+2*(mix2.crossover_points/2);
for(i=ia; i<ib; i+=2) {
baseb_wb_raw[2*p0 ]=fft3_tmp[i+k ]*mix2.window[j];
baseb_wb_raw[2*p0+1]=fft3_tmp[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
j++;
}
j--;
ic=2*mix2.new_points;
for(i=ib; i<ic; i+=2) {
j--;
baseb_wb_raw[2*p0 ]=fft3_tmp[i+k ]*mix2.window[j];
baseb_wb_raw[2*p0+1]=fft3_tmp[i+k+1]*mix2.window[j];
p0=(p0+1)&baseband_mask;
}
id=2*(mix2.crossover_points+mix2.new_points);
for(i=ic; i<id; i+=2) {
baseb_wb_raw[2*p0 ]=fft3_tmp[i+k ];
baseb_wb_raw[2*p0+1]=fft3_tmp[i+k+1];
p0=(p0+1)&baseband_mask;
}
}
}
last_point=(baseb_pa+mix2.new_points)&baseband_mask;
ampfac=cg_size*daout_gain/bg_amplimit;
// *******************************************************************
// Calculate the amplitude of the signal and the amplitude of the carrier.
// Store sines and cosines of the carrier phase.
// Make an I/Q demodulator using the carrier phase.
// Use this "zero level" coherent detect data to make the upper coherent
// graph that will help the user select coherence ratio for unstable
// signals.
if(fm_pilot_size == 0) {
t2=0;
t5=0;
cg_mid=cg_size/2;
big=0.499*cg_size;
ia=baseb_pa;
i=(baseb_pa+baseband_mask)&baseband_mask;
if(genparm[CW_DECODE_ENABLE] != 0 || bg.agc_flag == 1) {
t2=baseb_upthreshold[i];
}
if(bg.agc_flag == 2) {
t2=baseb_upthreshold[2*i ];
t5=baseb_upthreshold[2*i+1];
}
t3=0;
t4=0;
if(bg_twopol == 0) {
while(ia != last_point) {
baseb_totpwr[ia]=baseb_raw[2*ia ]*baseb_raw[2*ia ]+
baseb_raw[2*ia+1]*baseb_raw[2*ia+1];
t4+=baseb_totpwr[ia];
if(t3 < baseb_totpwr[ia])t3=baseb_totpwr[ia];
baseb_carrier_ampl[ia]=sqrt(baseb_carrier[2*ia ]*baseb_carrier[2*ia ]+
baseb_carrier[2*ia+1]*baseb_carrier[2*ia+1]);
if(genparm[CW_DECODE_ENABLE] != 0 || bg.agc_flag == 1) {
t2*=cg_decay_factor;
if(t2 < baseb_totpwr[ia])t2=baseb_totpwr[ia];
baseb_upthreshold[ia]=t2;
}
if(baseb_carrier_ampl[ia]==0) {
baseb_carrier_ampl[ia]=0.0000000000001;
} else {
baseb_carrier[2*ia ]/=baseb_carrier_ampl[ia];
baseb_carrier[2*ia+1]/=baseb_carrier_ampl[ia];
}
baseb[2*ia ]=baseb_carrier[2*ia ]*baseb_raw[2*ia ]+
baseb_carrier[2*ia+1]*baseb_raw[2*ia+1];
baseb[2*ia+1]=baseb_carrier[2*ia ]*baseb_raw[2*ia+1]-
baseb_carrier[2*ia+1]*baseb_raw[2*ia ];
if(bg.agc_flag == 2) {
baseb[2*ia ]-=baseb_carrier_ampl[ia];
t2*=cg_decay_factor;
if(t2 < baseb[2*ia ]*baseb[2*ia ])t2=baseb[2*ia ]*baseb[2*ia ];
baseb_upthreshold[2*ia ]=t2;
t5*=cg_decay_factor;
if(t5 < baseb[2*ia+1]*baseb[2*ia+1])t5=baseb[2*ia+1]*baseb[2*ia+1];
baseb_upthreshold[2*ia+1]=t5;
}
r1=ampfac*baseb[2*ia ];
r2=ampfac*baseb[2*ia+1];
if(genparm[CW_DECODE_ENABLE] != 0) {
baseb_fit[2*ia ]=0;
baseb_fit[2*ia+1]=0;
baseb_envelope[2*ia ]=0;
baseb_envelope[2*ia+1]=0;
}
ia=(ia+1)&baseband_mask;
if(fabs(r1)>big || fabs(r2)>big) {
t1=big/sqrt(r1*r1+r2*r2);
r1*=t1;
r2*=t1;
}
ix=cg_mid+r1;
iy=cg_mid+r2;
cg_map[iy*cg_size+ix]+=1;
}
} else {
while(ia != last_point) {
baseb_totpwr[ia]=baseb_raw[2*ia ]*baseb_raw[2*ia ]+
baseb_raw[2*ia+1]*baseb_raw[2*ia+1];
t4+=baseb_totpwr[ia];
if(t3 < baseb_totpwr[ia])t3=baseb_totpwr[ia];
baseb_carrier_ampl[ia]=sqrt(baseb_carrier[2*ia ]*baseb_carrier[2*ia ]+
baseb_carrier[2*ia+1]*baseb_carrier[2*ia+1]);
if(genparm[CW_DECODE_ENABLE] != 0 || bg.agc_flag == 1) {
t2*=cg_decay_factor;
if(t2 < baseb_totpwr[ia])t2=baseb_totpwr[ia];
baseb_upthreshold[ia]=t2;
}
if(baseb_carrier_ampl[ia]==0) {
baseb_carrier_ampl[ia]=0.0000000000001;
} else {
baseb_carrier[2*ia ]/=baseb_carrier_ampl[ia];
baseb_carrier[2*ia+1]/=baseb_carrier_ampl[ia];
}
baseb[2*ia ]=baseb_carrier[2*ia ]*baseb_raw[2*ia ]+
baseb_carrier[2*ia+1]*baseb_raw[2*ia+1];
baseb[2*ia+1]=baseb_carrier[2*ia ]*baseb_raw[2*ia+1]-
baseb_carrier[2*ia+1]*baseb_raw[2*ia ];
if(bg.agc_flag == 2) {
t2*=cg_decay_factor;
if(t2 < baseb_totpwr[ia])t2=baseb_totpwr[ia];
baseb_upthreshold[2*ia]=t2;
t5*=cg_decay_factor;
if(t5 < baseb_raw_orthog[2*ia ]*baseb_raw_orthog[2*ia ]+
baseb_raw_orthog[2*ia+1]*baseb_raw_orthog[2*ia+1])
t5=baseb_raw_orthog[2*ia ]*baseb_raw_orthog[2*ia ]+
baseb_raw_orthog[2*ia+1]*baseb_raw_orthog[2*ia+1];
baseb_upthreshold[2*ia+1]=t5;
}
r1=ampfac*baseb[2*ia ];
r2=ampfac*baseb[2*ia+1];
if(genparm[CW_DECODE_ENABLE] != 0) {
baseb_fit[2*ia ]=0;
baseb_fit[2*ia+1]=0;
baseb_envelope[2*ia ]=0;
baseb_envelope[2*ia+1]=0;
}
ia=(ia+1)&baseband_mask;
if(fabs(r1)>big || fabs(r2)>big) {
t1=big/sqrt(r1*r1+r2*r2);
r1*=t1;
r2*=t1;
}
ix=cg_mid+r1;
iy=cg_mid+r2;
cg_map[iy*cg_size+ix]+=1;
}
}
} else {
ia=baseb_pa;
t3=0;
t4=0;
while(ia != last_point) {
baseb_totpwr[ia]=baseb_raw[2*ia ]*baseb_raw[2*ia ]+
baseb_raw[2*ia+1]*baseb_raw[2*ia+1];
t4+=baseb_totpwr[ia];
if(t3 < baseb_totpwr[ia])t3=baseb_totpwr[ia];
ia=(ia+1)&baseband_mask;
}
}
basblock_maxpower[basblock_pa]=t3;
basblock_avgpower[basblock_pa]=t4/sizhalf;
basblock_pa=(basblock_pa+1)&basblock_mask;
// **********************************************************
// If morse decoding is enabled, compute the fourier transform
// of the real part of baseb_wb. Since this array is not needed
// for any other purpose, we do not store it so its real part
// is computed from baseb_carrier and baseb_wb_raw.
// The phase is zero in good
// regions where the carrier is correct. Use the level of the
// carrier as a weight factor to suppress regions where
// the signal is likely to be absent or incorrect.
if(genparm[CW_DECODE_ENABLE] != 0) {
if(fft3_slowsum_cnt < 1) {
lir_sched_yield();
if(mix1_selfreq[0]>0)lirerr(341296);
return;
}
noise_floor*=2.818/fft3_slowsum_cnt;
baseband_noise_level=noise_floor*bgfil_weight;
carrier_noise_level=noise_floor*carrfil_weight;
ia=(last_point-mix2.size+baseband_mask)&baseband_mask;
if( ((ia-baseb_px+baseband_size)&baseband_mask) < baseband_neg) {
for(i=0; i<(int)mix2.size; i++) {
t1=P2SCALE*baseb_carrier_ampl[ia]*baseb_carrier_ampl[ia];
if(t1 > 0) {
mix2_tmp[2*i]=P4SCALE*(baseb_carrier[2*ia ]*baseb_wb_raw[2*ia ]+
baseb_carrier[2*ia+1]*baseb_wb_raw[2*ia+1])*
sqrt(t1)*cw_carrier_window[i];
} else {
mix2_tmp[2*i ]=0;
}
mix2_tmp[2*i+1]=0;
ia=(ia+1)&baseband_mask;
}
fftforward(mix2.size, mix2.n, mix2_tmp,
mix2.table, mix2.permute, yieldflag_ndsp_mix2);
// The fourier transform here should have been computed
// with a real to hermitian fft implementation. Just filling
// the complex part with zeroes is inefficient.
//
// The keying spectra arrive at a rate of 2*baseband_sampling_speed/mix2.size.
// Accumulate power spectra in a leaky integrator that has a life time
// of 15 seconds.
t2=1-keying_spectrum_f1;
keying_spectrum_cnt++;
for(i=0; i<keying_spectrum_size; i++) {
keying_spectrum[i]=keying_spectrum_f1*keying_spectrum[i]+
t2*(pow(mix2_tmp[2*i ],2.0)+pow(mix2_tmp[2*i+1],2.0));
}
sc[SC_SHOW_KEYING_SPECTRUM]++;
}
}
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
cg_update_count++;
if(cg_update_count > cg_update_interval) {
sc[SC_SHOW_COHERENT]++;
cg_update_count=0;
}
// Make data for the S-meter graph.
if(mg.avgnum > 0 && new_baseb_flag == 0) {
j=((last_point-baseb_pm+baseband_mask)&baseband_mask)/mg.avgnum;
if(j > 0) {
sellim_correction=1;
fac=baseband_pwrfac*sellim_correction;
if(timf2_blockpower_px == -1) {
i=(int)((float)fft3_size*timf3_sampling_speed/timf1_sampling_speed);
timf2_blockpower_px=(timf2_blockpower_pa-4*(mg.avgnum+i)/3+
timf2_blockpower_size)&timf2_blockpower_mask;
}
i=(timf2_blockpower_pa-timf2_blockpower_px+
timf2_blockpower_size)&timf2_blockpower_mask;
if(i <= j*mg.avgnum) {
i=j*mg.avgnum+1;
timf2_blockpower_px=(timf2_blockpower_pa-i+
timf2_blockpower_size)&timf2_blockpower_mask;
}
for(i=0; i<j; i++) {
dt1=0.000000001;
dt2=0.000000001;
dr3=0.000000001;
dr4=0.000000001;
dt3=0.000000001;
dt4=0.000000001;
ia=(baseb_pm+mg.avgnum)&baseband_mask;
if(sw_onechan) {
if(mg.scale_type == MG_SCALE_STON) {
while(baseb_pm != ia) {
dt1+=baseb_totpwr[baseb_pm];
if(dt2 < baseb_totpwr[baseb_pm])dt2=baseb_totpwr[baseb_pm];
baseb_pm=(baseb_pm+1)&baseband_mask;
dr3+=(double)timf2_blockpower[timf2_blockpower_px];
timf2_blockpower_px=(timf2_blockpower_px+1)&timf2_blockpower_mask;
}
mg_peak_meter[mg_pa]=log10(fac*dt1/mg.avgnum)+mg.cal_ston_sigshift/10;
dr3*=liminfo_amplitude_factor;
dt1/=dr3;
dt1*=(double)(20000.)*mg.avgnum*timf2_blockpower_block;
dt1/=(double)fft2_to_fft1_ratio*(double)fft2_to_fft1_ratio;
// Compensating for the percentage of cleared points may be a bad idea.
// The dumb blanker will not remove the entire pulse and a compensation
// might make things worse.
// dt1*=(1-0.01*stupid_blanker_rate);