w4kek
/
WSJT-X
mirror of https://github.com/saitohirga/WSJT-X.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Many improvements to qratest. 

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6937 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor 2016-07-22 16:56:08 +00:00
parent 44d2f446a2
commit f60f7d2060
1 changed files with 118 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

184
lib/qratest.f90
View File

@ -2,39 +2,66 @@ program qratest
parameter (NMAX=60*12000)
real dd(NMAX)
real t(5)
integer*8 count0,count1,clkfreq
character*8 arg
nargs=iargc()
if(nargs.ne.2) then
print*,'Usage: qratest f0 fTol'
go to 999
endif
call getarg(1,arg)
read(arg,*) nf0
call getarg(2,arg)
read(arg,*) ntol
nf1=nf0-ntol
nf2=nf0+ntol
do n=1,999
read(60,end=999) dd
call sync64(dd,dtx,f0,snr)
write(*,1000) dtx,f0,snr
1000 format('DT:',f6.2,' f0:',f7.1,' Sync S/N:',f10.1)
call system_clock(count0,clkfreq)
call sync64(dd,nf1,nf2,dtx,f0,f01,f02,f03,snr,t)
call system_clock(count1,clkfreq)
tsec=float(count1-count0)/float(clkfreq)
! nf0=200*nint(f0/200.)
dfreq0=f0-nf0
dfreq1=f01-nf0
dfreq2=f02-nf0
dfreq3=f03-nf0
write(*,1000) dtx,f0,dfreq0,dfreq1,dfreq2,dfreq3,snr,tsec,t(1),t(2)
1000 format(f8.3,f8.2,4f7.2,f8.1,3f6.3)
enddo
999 end program qratest
subroutine sync64(dd,dtx,f0,snr)
parameter (NMAX=60*12000)
real dd(NMAX)
real x(672000)
subroutine sync64(dd,nf1,nf2,dtx,f0,f01,f02,f03,snr,t)
parameter (NMAX=60*12000) !Max size of raw data at 12000 Hz
parameter (NSPS=2304) !Samples per symbol at 4000 Hz
parameter (NSPC=7*NSPS) !Samples per Costas array
real dd(NMAX) !Raw data
real x(672000) !Up to 56 s at 12000 Hz
real t(5)
real s0(0:16127)
real s1(0:16127)
real s2(0:16127)
real s3(0:16127)
real s0(0:NSPC-1)
real s1(0:NSPC-1)
real s2(0:NSPC-1)
real s3(0:NSPC-1)
real s0a(0:16127)
real s1a(0:16127)
real s2a(0:16127)
real s3a(0:16127)
real s0a(0:NSPC-1)
real s1a(0:NSPC-1)
real s2a(0:NSPC-1)
real s3a(0:NSPC-1)
integer*8 count0,count1,clkfreq
integer icos7(0:6)
integer ipk(1)
complex cc(0:16127)
complex cc(0:NSPC-1)
complex c0(0:336000)
complex c1(0:16127)
complex c2(0:16127)
complex c3(0:16127)
complex c1(0:NSPC-1)
complex c2(0:NSPC-1)
complex c3(0:NSPC-1)
equivalence (x,c0)
data icos7/2,5,6,0,4,1,3/ !Costas 7x7 pattern
@ -58,59 +85,84 @@ subroutine sync64(dd,dtx,f0,snr)
df1=12000.0/nfft1
fac=2.0/nfft1
x=fac*dd(1:nfft1)
call four2a(c0,nfft1,1,-1,0) !Forward r2c FFT
call four2a(c0,nfft2,1,1,1) !Inverse c2c FFT
npts2=npts0/3 !Downsampled complex data length
nfft3=16128
call system_clock(count0,clkfreq)
call four2a(c0,nfft1,1,-1,0) !Forward r2c FFT
call four2a(c0,nfft2,1,1,1) !Inverse c2c FFT; c0 is analytic sig
call system_clock(count1,clkfreq)
t(1)=float(count1-count0)/float(clkfreq)
npts2=npts0/3 !Downsampled complex data length
nfft3=NSPC
nh3=nfft3/2
df3=4000.0/nfft3
iz=750.0/df3
ia=nint(nf1/df3)
ib=nint(nf2/df3)
iz=ib-ia+1
smax=0.
jpk=0
do j1=0,24000,20
j2=j1 + 39*2304
j3=j1 + 77*2304
c1=1.e-4*c0(j1:j1+16127) * conjg(cc)
call four2a(c1,nfft3,1,-1,1)
c2=1.e-4*c0(j2:j2+16127) * conjg(cc)
call four2a(c2,nfft3,1,-1,1)
c3=1.e-4*c0(j3:j3+16127) * conjg(cc)
call four2a(c3,nfft3,1,-1,1)
do i=0,nfft3-1
freq=i*df3
s1(i)=real(c1(i))**2 + aimag(c1(i))**2
s2(i)=real(c2(i))**2 + aimag(c2(i))**2
s3(i)=real(c3(i))**2 + aimag(c3(i))**2
enddo
call smo121(s1,nfft3)
call smo121(s2,nfft3)
call smo121(s3,nfft3)
s0=s1+s2+s3
s=maxval(s0)
if(s.gt.smax) then
jpk=j1
s0a=s0
s1a=s1
s2a=s2
s3a=s3
smax=s
ipk=maxloc(s0)
dtx=jpk/4000.0 - 1.0
f0=(ipk(1)-1)*df3
endif
enddo
s0=0.
ja=0
jb=6*4000
jstep=200
call system_clock(count0,clkfreq)
do iter=1,2
do j1=ja,jb,jstep
j2=j1 + 39*2304
j3=j1 + 77*2304
c1=1.e-4*c0(j1:j1+NSPC-1) * conjg(cc)
call four2a(c1,nfft3,1,-1,1)
c2=1.e-4*c0(j2:j2+NSPC-1) * conjg(cc)
call four2a(c2,nfft3,1,-1,1)
c3=1.e-4*c0(j3:j3+NSPC-1) * conjg(cc)
call four2a(c3,nfft3,1,-1,1)
do i=ia,ib
freq=i*df3
s1(i)=real(c1(i))**2 + aimag(c1(i))**2
s2(i)=real(c2(i))**2 + aimag(c2(i))**2
s3(i)=real(c3(i))**2 + aimag(c3(i))**2
enddo
call smo121(s1(ia:ib),iz)
call smo121(s2(ia:ib),iz)
call smo121(s3(ia:ib),iz)
s0(ia:ib)=s1(ia:ib) + s2(ia:ib) + s3(ia:ib)
s=maxval(s0(ia:ib))
if(s.gt.smax) then
jpk=j1
s0a=s0
s1a=s1
s2a=s2
s3a=s3
smax=s
dtx=jpk/4000.0 - 1.0
ipk=maxloc(s0(ia:ib))
f0=(ipk(1)+ia-1)*df3
sq=dot_product(s0a,s0a)
ave=sum(s0a)/nfft3
rms=sqrt(sq/nfft3 - ave*ave)
ipk=maxloc(s1(ia:ib))
f01=(ipk(1)+ia-1)*df3
ipk=maxloc(s2(ia:ib))
f02=(ipk(1)+ia-1)*df3
ipk=maxloc(s3(ia:ib))
f03=(ipk(1)+ia-1)*df3
endif
enddo
ja=jpk-2*jstep
jb=jpk+2*jstep
jstep=10
enddo
call system_clock(count1,clkfreq)
t(2)=float(count1-count0)/float(clkfreq)
ave=sum(s0a(ia:ib))/iz
sq=dot_product(s0a(ia:ib),s0a(ia:ib))
rms=sqrt(sq/iz - ave*ave)
snr=(smax-ave)/rms
do i=0,nfft3-1
freq=i*df3
if(freq.gt.2500.0) exit
write(14,1020) freq,s0a(i),s1a(i),s2a(i),s3a(i)
1020 format(f10.3,4f12.1)
enddo
! do i=0,nfft3-1
! freq=i*df3
! if(freq.gt.2500.0) exit
! write(14,1020) freq,s0a(i),s1a(i),s2a(i),s3a(i)
!1020 format(f10.3,4f12.1)
! enddo
end subroutine sync64