mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 10:01:57 -05:00
78a03a4926
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6963 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
172 lines
4.1 KiB
Fortran
172 lines
4.1 KiB
Fortran
program msk32d_ldpc
|
|
|
|
parameter (NZ=15*12000,NZ0=262144)
|
|
parameter (NSPM=6*32)
|
|
complex c0(0:NZ0-1)
|
|
complex c(0:NZ-1)
|
|
complex cmsg(0:NSPM-1,0:63)
|
|
complex z
|
|
real a(3)
|
|
real p0(0:NSPM-1)
|
|
real p(0:NSPM-1)
|
|
real s0(0:63)
|
|
real dd(NZ)
|
|
integer itone(144)
|
|
integer ihdr(11)
|
|
integer ipk0(1)
|
|
integer*2 id2(NZ)
|
|
character*22 msg,msgsent
|
|
character mycall*8,hiscall*6,arg*12,infile*80,datetime*13
|
|
character*4 rpt(0:63)
|
|
equivalence (ipk0,ipk)
|
|
|
|
nargs=iargc()
|
|
if(nargs.lt.5) then
|
|
print*,'Usage: msk32d Call_1 Call_2 f1 f2 file1 [file2 ...]'
|
|
print*,'Example: msk32d K9AN K1JT 1500 1500 fort.61'
|
|
go to 999
|
|
endif
|
|
call getarg(1,mycall)
|
|
call getarg(2,hiscall)
|
|
call getarg(3,arg)
|
|
read(arg,*) nf1
|
|
call getarg(4,arg)
|
|
read(arg,*) nf2
|
|
idf1=nf1-1500
|
|
idf2=nf2-1500
|
|
|
|
do i=0,30
|
|
if( i.lt.5 ) then
|
|
write(rpt(i),'(a1,i2.2,a1)') '-',abs(i-5)
|
|
write(rpt(i+31),'(a2,i2.2,a1)') 'R-',abs(i-5)
|
|
else
|
|
write(rpt(i),'(a1,i2.2,a1)') '+',i-5
|
|
write(rpt(i+31),'(a2,i2.2,a1)') 'R+',i-5
|
|
endif
|
|
enddo
|
|
rpt(62)='RRR '
|
|
rpt(63)='73 '
|
|
|
|
! Generate the test messages
|
|
twopi=8.0*atan(1.0)
|
|
nsym=32
|
|
freq=1500.0
|
|
dphi0=twopi*(freq-500.0)/12000.0
|
|
dphi1=twopi*(freq+500.0)/12000.0
|
|
do imsg=0,63
|
|
i=index(hiscall," ")
|
|
msg="<"//mycall//" "//hiscall(1:i-1)//"> "//rpt(imsg)
|
|
call fmtmsg(msg,iz)
|
|
ichk=0
|
|
call genmsk32(msg,msgsent,ichk,itone,itype)
|
|
|
|
phi=0.0
|
|
k=0
|
|
do i=1,nsym
|
|
dphi=dphi0
|
|
if(itone(i).eq.1) dphi=dphi1
|
|
do j=1,6
|
|
x=cos(phi)
|
|
y=sin(phi)
|
|
cmsg(k,imsg)=cmplx(x,y)
|
|
k=k+1
|
|
phi=phi+dphi
|
|
if(phi.gt.twopi) phi=phi-twopi
|
|
enddo
|
|
enddo
|
|
enddo
|
|
|
|
! Process the specified files
|
|
nfiles=nargs-4
|
|
do ifile=1,nfiles !Loop over all files
|
|
call getarg(ifile+4,infile)
|
|
open(10,file=infile,access='stream',status='old')
|
|
read(10) ihdr,id2
|
|
dd=0.03*id2
|
|
npts=NZ
|
|
n=log(float(npts))/log(2.0) + 1.0
|
|
nfft=min(2**n,1024*1024)
|
|
call analytic(dd,npts,nfft,c0) !Convert to analytic signal
|
|
sbest=0.
|
|
do imsg=0, 63 !Try all short messages
|
|
do idf=idf1,idf2,10 !Frequency dither
|
|
a(1)=-idf
|
|
a(2:3)=0.
|
|
call twkfreq(c0,c,npts,12000.0,a)
|
|
smax=0.
|
|
p=0.
|
|
fac=1.0/192
|
|
do j=0,npts-NSPM,2
|
|
z=fac*dot_product(c(j:j+NSPM-1),cmsg(0:NSPM-1,imsg))
|
|
s=real(z)**2 + aimag(z)**2
|
|
k=mod(j,NSPM)
|
|
p(k)=p(k)+s
|
|
! if(imsg.eq.30) write(13,1010) j/12000.0,s,k
|
|
!1010 format(2f12.6,i5)
|
|
if(s.gt.smax) then
|
|
smax=s
|
|
jpk=j
|
|
f0=idf
|
|
if(smax.gt.sbest) then
|
|
sbest=smax
|
|
p0=p
|
|
ibest=imsg
|
|
endif
|
|
endif
|
|
enddo
|
|
s0(imsg)=smax
|
|
enddo
|
|
enddo
|
|
|
|
ipk0=maxloc(p0)
|
|
ps=0.
|
|
sq=0.
|
|
ns=0
|
|
pmax=0.
|
|
do i=0,NSPM-1,2
|
|
j=ipk-i
|
|
if(j.gt.96) j=j-192
|
|
if(j.lt.-96) j=j+192
|
|
if(abs(j).gt.4) then
|
|
ps=ps+p0(i)
|
|
sq=sq+p0(i)**2
|
|
ns=ns+1
|
|
endif
|
|
enddo
|
|
avep=ps/ns
|
|
rmsp=sqrt(sq/ns - avep*avep)
|
|
p0=(p0-avep)/rmsp
|
|
p1=maxval(p0)
|
|
|
|
do i=0,NSPM-1,2
|
|
write(14,1030) i,i/12000.0,p0(i)
|
|
1030 format(i5,f10.6,f10.3)
|
|
enddo
|
|
|
|
ave=(sum(s0)-sbest)/63
|
|
s0=s0-ave
|
|
s1=sbest-ave
|
|
s2=0.
|
|
do i=0,63
|
|
if(i.ne.ibest .and. s0(i).gt.s2) s2=s0(i)
|
|
write(15,1020) i,idf,jpk/12000.0,s0(i)
|
|
1020 format(2i6,2f10.2)
|
|
enddo
|
|
|
|
i=index(infile,".wav")
|
|
datetime=infile(i-13:i-1)
|
|
r1=s1/s2
|
|
r2=r1+p1
|
|
msg=" "
|
|
! if(r1.gt.2.2 .or. p1.gt.7.0) then
|
|
if(r2.gt.5.0) then
|
|
i=index(hiscall," ")
|
|
msg="<"//mycall//" "//hiscall(1:i-1)//"> "//rpt(ibest)
|
|
call fmtmsg(msg,iz)
|
|
endif
|
|
write(*,1040) datetime,r1,p1,r2,msg
|
|
1040 format(a13,3f7.1,2x,a22)
|
|
enddo
|
|
|
|
999 end program msk32d_ldpc
|