mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-04-04 02:18:37 -04:00
Remove obsolete msk144 routines.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6773 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke
parent
45c36a5738
commit
fea1f88dce
@ -399,7 +399,6 @@ set (wsjt_FSRCS
|
||||
lib/morse.f90
|
||||
lib/move.f90
|
||||
lib/mskdt.f90
|
||||
lib/msk144dt.f90
|
||||
lib/msk144d.f90
|
||||
lib/msk144_decode.f90
|
||||
lib/options.f90
|
||||
@ -441,7 +440,6 @@ set (wsjt_FSRCS
|
||||
lib/sync9w.f90
|
||||
lib/synciscat.f90
|
||||
lib/syncmsk.f90
|
||||
lib/syncmsk144.f90
|
||||
lib/timer_C_wrapper.f90
|
||||
lib/timer_impl.f90
|
||||
lib/timer_module.f90
|
||||
|
||||
@ -1,78 +0,0 @@
|
||||
subroutine msk144dt(d,npts,ty,yellow,nyel)
|
||||
|
||||
parameter (NFFT=1024,NH=NFFT/2)
|
||||
real d(npts)
|
||||
real x(0:NFFT-1)
|
||||
real green(703)
|
||||
real yellow(703) !703 = 30*12000/512
|
||||
real ty(703)
|
||||
real y2(175)
|
||||
real ty2(175)
|
||||
integer indx(703)
|
||||
logical ok
|
||||
complex c(0:NH)
|
||||
equivalence (x,c)
|
||||
|
||||
df=12000.0/NFFT
|
||||
i1=nint(300.0/df)
|
||||
i2=nint(800.0/df)
|
||||
i3=nint(2200.0/df)
|
||||
i4=nint(2700.0/df)
|
||||
nblks=npts/NH - 1
|
||||
|
||||
do j=1,nblks
|
||||
ib=(j+1)*NH
|
||||
ia=ib-NFFT+1
|
||||
x=d(ia:ib)
|
||||
call four2a(x,NFFT,1,-1,0) !r2c FFT
|
||||
sqlow=0.
|
||||
do i=i1,i2
|
||||
sqlow=sqlow + real(c(i))**2 + aimag(c(i))**2
|
||||
enddo
|
||||
sqmid=0.
|
||||
do i=i2,i3
|
||||
sqmid=sqmid + real(c(i))**2 + aimag(c(i))**2
|
||||
enddo
|
||||
sqhigh=0.
|
||||
do i=i3,i4
|
||||
sqhigh=sqhigh + real(c(i))**2 + aimag(c(i))**2
|
||||
enddo
|
||||
green(j)=db(sqlow+sqmid+sqhigh)
|
||||
yellow(j)=db(sqmid/(sqlow+sqhigh))
|
||||
ty(j)=j*512.0/12000.0
|
||||
enddo
|
||||
|
||||
npct=20
|
||||
call pctile(green,nblks,npct,base)
|
||||
green(1:nblks)=green(1:nblks) - base - 0.3
|
||||
call pctile(yellow,nblks,npct,base)
|
||||
yellow(1:nblks)=yellow(1:nblks) - base - 0.6
|
||||
call indexx(yellow,nblks,indx)
|
||||
|
||||
do j=1,nblks/4
|
||||
k=indx(nblks+1-j)
|
||||
ty(j)=ty(k)
|
||||
yellow(j)=yellow(k)
|
||||
if(yellow(j).lt.1.4) exit
|
||||
enddo
|
||||
nyel=j-1
|
||||
k=1
|
||||
y2(1)=yellow(1)
|
||||
ty2(1)=ty(1)
|
||||
do j=2,nyel
|
||||
ok=.true.
|
||||
do i=1,j-1
|
||||
if(abs(ty(i)-ty(j)).lt.0.05) ok=.false.
|
||||
enddo
|
||||
if(ok) then
|
||||
k=k+1
|
||||
y2(k)=yellow(j)
|
||||
ty2(k)=ty(j)
|
||||
endif
|
||||
enddo
|
||||
nyel=k
|
||||
yellow(1:nyel)=y2(1:nyel)
|
||||
ty(1:nyel)=ty2(1:nyel)
|
||||
|
||||
return
|
||||
end subroutine msk144dt
|
||||
@ -1,357 +0,0 @@
|
||||
subroutine syncmsk144(cdat,npts,pchk_file,msgreceived,fest,nutc,t0)
|
||||
!nutc and t0 are for debug output
|
||||
use iso_c_binding, only: c_loc,c_size_t
|
||||
use packjt
|
||||
use hashing
|
||||
use timer_module, only: timer
|
||||
|
||||
parameter (NSPM=864)
|
||||
character*22 msgreceived
|
||||
character*512 pchk_file,gen_file
|
||||
complex cdat(npts) !Analytic signal
|
||||
complex cdat2(npts)
|
||||
complex c(NSPM)
|
||||
complex ctmp(6000)
|
||||
complex cb(42) !Complex waveform for sync word
|
||||
complex cfac,cca,ccb
|
||||
complex cc(npts)
|
||||
complex cc1(npts)
|
||||
complex cc2(npts)
|
||||
complex bb(6)
|
||||
integer s8(8),hardbits(144),hardword(128),unscrambledhardbits(128)
|
||||
integer*1, target:: i1Dec8BitBytes(10)
|
||||
integer, dimension(1) :: iloc
|
||||
integer*4 i4Dec6BitWords(12)
|
||||
integer*1 decoded(80)
|
||||
integer*1 i1hashdec
|
||||
integer ipeaks(10)
|
||||
logical ismask(6000)
|
||||
real cbi(42),cbq(42)
|
||||
real tonespec(6000)
|
||||
real rcw(12)
|
||||
real dd(npts)
|
||||
real pp(12) !Half-sine pulse shape
|
||||
real*8 dt, df, fs, pi, twopi
|
||||
real softbits(144)
|
||||
real*8 unscrambledsoftbits(128)
|
||||
real lratio(128)
|
||||
logical first
|
||||
data first/.true./
|
||||
|
||||
data s8/0,1,1,1,0,0,1,0/
|
||||
save first,cb,pi,twopi,dt,s8,rcw,pp
|
||||
|
||||
if(first) then
|
||||
i=index(pchk_file,".pchk")
|
||||
gen_file=pchk_file(1:i-1)//".gen"
|
||||
call init_ldpc(trim(pchk_file)//char(0),trim(gen_file)//char(0))
|
||||
! define half-sine pulse and raised-cosine edge window
|
||||
pi=4d0*datan(1d0)
|
||||
twopi=8d0*datan(1d0)
|
||||
dt=1.0/12000.0
|
||||
do i=1,12
|
||||
angle=(i-1)*pi/12.0
|
||||
pp(i)=sin(angle)
|
||||
rcw(i)=(1-cos(angle))/2
|
||||
enddo
|
||||
|
||||
! define the sync word waveform
|
||||
s8=2*s8-1
|
||||
cbq(1:6)=pp(7:12)*s8(1)
|
||||
cbq(7:18)=pp*s8(3)
|
||||
cbq(19:30)=pp*s8(5)
|
||||
cbq(31:42)=pp*s8(7)
|
||||
cbi(1:12)=pp*s8(2)
|
||||
cbi(13:24)=pp*s8(4)
|
||||
cbi(25:36)=pp*s8(6)
|
||||
cbi(37:42)=pp(1:6)*s8(8)
|
||||
cb=cmplx(cbi,cbq)
|
||||
|
||||
first=.false.
|
||||
endif
|
||||
|
||||
! Coarse carrier frequency sync
|
||||
! look for tones near 2k and 4k in the (analytic signal)**2 spectrum
|
||||
! search range for coarse frequency error is +/- 100 Hz
|
||||
fs=12000.0
|
||||
nfft=6000 !using a zero-padded fft to get 2 Hz bins
|
||||
df=fs/nfft
|
||||
|
||||
ctmp=cmplx(0.0,0.0)
|
||||
ctmp(1:npts)=cdat**2
|
||||
ctmp(1:12)=ctmp(1:12)*rcw
|
||||
ctmp(npts-11:npts)=ctmp(npts-11:npts)*rcw(12:1:-1)
|
||||
call four2a(ctmp,nfft,1,-1,1)
|
||||
tonespec=abs(ctmp)**2
|
||||
|
||||
ismask=.false.
|
||||
ismask(1901:2101)=.true. ! high tone search window
|
||||
iloc=maxloc(tonespec,ismask)
|
||||
ihpk=iloc(1)
|
||||
ah=tonespec(ihpk)
|
||||
ismask=.false.
|
||||
ismask(901:1101)=.true. ! window for low tone
|
||||
iloc=maxloc(tonespec,ismask)
|
||||
ilpk=iloc(1)
|
||||
al=tonespec(ilpk)
|
||||
fdiff=(ihpk-ilpk)*df
|
||||
ferrh=(ihpk-2001)*df/2.0
|
||||
ferrl=(ilpk-1001)*df/2.0
|
||||
if( abs(fdiff-2000) .le. 16.0 ) then
|
||||
if( ah .ge. al ) then
|
||||
ferr=ferrh
|
||||
else
|
||||
ferr=ferrl
|
||||
endif
|
||||
else
|
||||
msgreceived=' '
|
||||
phase0=-97 !-97 is failed carrier sync, -98 failure to decode, -99 decoded, bad hash
|
||||
niterations=0
|
||||
ndither=0
|
||||
i1hashdec=0
|
||||
fest=0.0
|
||||
i1Dec8BitBytes=0
|
||||
nbadsync1=-1
|
||||
nbadsync2=-1
|
||||
goto 999
|
||||
endif
|
||||
|
||||
! remove coarse freq error - should now be within a few Hz
|
||||
call tweak1(cdat,npts,-(1500+ferr),cdat)
|
||||
|
||||
! attempt frame synchronization
|
||||
! correlate with sync word waveforms - the resulting complex
|
||||
! correlations provide all synch information.
|
||||
cc=0
|
||||
cc1=0
|
||||
cc2=0
|
||||
do i=1,npts-(56*6+41)
|
||||
cc1(i)=sum(cdat(i:i+41)*conjg(cb))
|
||||
cc2(i)=sum(cdat(i+56*6:i+56*6+41)*conjg(cb))
|
||||
enddo
|
||||
cc=cc1+cc2
|
||||
dd=abs(cc1)*abs(cc2)
|
||||
|
||||
! Find 5 largest peaks
|
||||
do ipk=1,5
|
||||
iloc=maxloc(abs(cc))
|
||||
ic1=iloc(1)
|
||||
iloc=maxloc(dd)
|
||||
ic2=iloc(1)
|
||||
ipeaks(ipk)=ic2
|
||||
dd(max(1,ic2-7):min(npts-56*6-41,ic2+7))=0.0
|
||||
enddo
|
||||
|
||||
! See if we can find "closed brackets" - a pair of peaks that differ by 864, plus or minus
|
||||
! This information is not yet used for anything
|
||||
! do ii=1,5
|
||||
! do jj=ii+1,5
|
||||
! if( (ii .ne. jj) .and. (abs( abs(ipeaks(ii)-ipeaks(jj))-864) .le. 5) ) then
|
||||
! write(*,*) "closed brackets: ",ii,jj,ipeaks(ii),ipeaks(jj),abs(ipeaks(ii)-ipeaks(jj))
|
||||
! endif
|
||||
! enddo
|
||||
! enddo
|
||||
|
||||
do ipk=1,5
|
||||
|
||||
! we want ic to be the index of the first sample of the frame
|
||||
ic0=ipeaks(ipk)
|
||||
|
||||
! fine adjustment of sync index
|
||||
! bb lag used to place the sampling index at the center of the eye
|
||||
do i=1,6
|
||||
if( ic0+11+NSPM .le. npts ) then
|
||||
bb(i) = sum( ( cdat(ic0+i-1+6:ic0+i-1+6+NSPM:6) * conjg( cdat(ic0+i-1:ic0+i-1+NSPM:6) ) )*2 )
|
||||
else
|
||||
bb(i) = sum( ( cdat(ic0+i-1+6:npts:6) * conjg( cdat(ic0+i-1:npts-6:6) ) )*2 )
|
||||
endif
|
||||
enddo
|
||||
iloc=maxloc(abs(bb))
|
||||
ibb=iloc(1)
|
||||
bba=abs(bb(ibb))
|
||||
if( ibb .le. 3 ) ibb=ibb-1
|
||||
if( ibb .gt. 3 ) ibb=ibb-7
|
||||
do id=1,3 ! slicer dither
|
||||
if( id .eq. 1 ) is=0
|
||||
if( id .eq. 2 ) is=-1
|
||||
if( id .eq. 3 ) is=1
|
||||
! Adjust frame index to place peak of bb at desired lag
|
||||
ic=ic0+ibb+is
|
||||
if( ic .lt. 1 ) ic=ic+864
|
||||
|
||||
! Estimate fine frequency error.
|
||||
! Should a larger separation be used when frames are averaged?
|
||||
cca=sum(cdat(ic:ic+41)*conjg(cb))
|
||||
if( ic+56*6+41 .le. npts ) then
|
||||
ccb=sum(cdat(ic+56*6:ic+56*6+41)*conjg(cb))
|
||||
cfac=ccb*conjg(cca)
|
||||
ferr2=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
|
||||
else
|
||||
ccb=sum(cdat(ic-88*6:ic-88*6+41)*conjg(cb))
|
||||
cfac=cca*conjg(ccb)
|
||||
ferr2=atan2(imag(cfac),real(cfac))/(twopi*88*6*dt)
|
||||
endif
|
||||
|
||||
! Final estimate of the carrier frequency - returned to the calling program
|
||||
fest=1500+ferr+ferr2
|
||||
! Remove fine frequency error
|
||||
call tweak1(cdat,npts,-ferr2,cdat2)
|
||||
|
||||
! place the beginning of frame at index NSPM+1
|
||||
cdat2=cshift(cdat2,ic-(NSPM+1))
|
||||
|
||||
do iav=1,7
|
||||
! Try each of the three frames individually, and then
|
||||
! do frame averaging on passes 4 and 5
|
||||
if( 0 .eq. 1 ) then
|
||||
if( iav .eq. 1 ) then
|
||||
c=cdat2(1:NSPM)
|
||||
elseif( iav .eq. 2 ) then
|
||||
c=cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 3 ) then
|
||||
c=cdat2(2*NSPM+1:npts)
|
||||
elseif( iav .eq. 4 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 5 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 6 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 7 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 8 ) then
|
||||
c=cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
|
||||
elseif( iav .eq. 9 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
|
||||
endif
|
||||
endif
|
||||
|
||||
if( iav .eq. 1 ) then
|
||||
c(1:NSPM)=cdat2(NSPM+1:2*NSPM) !avg 1 frame to the right of ic
|
||||
elseif( iav .eq. 2 ) then
|
||||
c=cdat2(NSPM-431:NSPM+432) !1 frame centered on ic
|
||||
c=cshift(c,-432)
|
||||
elseif( iav .eq. 3 ) then !1 frame to the left of ic
|
||||
c=cdat2(1:NSPM)
|
||||
elseif( iav .eq. 4 ) then
|
||||
c=cdat2(NSPM+432:NSPM+432+863) !1 frame beginning 36ms to the right of ic
|
||||
c=cshift(c,432)
|
||||
elseif( iav .eq. 5 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)
|
||||
elseif( iav .eq. 6 ) then
|
||||
c=cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
|
||||
elseif( iav .eq. 7 ) then
|
||||
c=cdat2(1:NSPM)+cdat2(NSPM+1:2*NSPM)+cdat2(2*NSPM+1:npts)
|
||||
endif
|
||||
|
||||
! Estimate final frequency error and carrier phase.
|
||||
cca=sum(c(1:1+41)*conjg(cb))
|
||||
ccb=sum(c(1+56*6:1+56*6+41)*conjg(cb))
|
||||
cfac=ccb*conjg(cca)
|
||||
ffin=atan2(imag(cfac),real(cfac))/(twopi*56*6*dt)
|
||||
phase0=atan2(imag(cca+ccb),real(cca+ccb))
|
||||
|
||||
cfac=cmplx(cos(phase0),sin(phase0))
|
||||
c=c*conjg(cfac)
|
||||
|
||||
! sample to get softsamples
|
||||
! do i=1,72
|
||||
! softbits(2*i-1)=imag(c(1+(i-1)*12))
|
||||
! softbits(2*i)=real(c(7+(i-1)*12))
|
||||
! enddo
|
||||
|
||||
! matched filter
|
||||
softbits(1)=sum(imag(c(1:6))*pp(7:12))+sum(imag(c(864-5:864))*pp(1:6))
|
||||
softbits(2)=sum(real(c(1:12))*pp)
|
||||
do i=2,72
|
||||
softbits(2*i-1)=sum(imag(c(1+(i-1)*12-6:1+(i-1)*12+5))*pp)
|
||||
softbits(2*i)=sum(real(c(7+(i-1)*12-6:7+(i-1)*12+5))*pp)
|
||||
enddo
|
||||
|
||||
hardbits=0
|
||||
do i=1,144
|
||||
if( softbits(i) .ge. 0.0 ) then
|
||||
hardbits(i)=1
|
||||
endif
|
||||
enddo
|
||||
nbadsync1=(8-sum( (2*hardbits(1:8)-1)*s8 ) )/2
|
||||
nbadsync2=(8-sum( (2*hardbits(1+56:8+56)-1)*s8 ) )/2
|
||||
nbadsync=nbadsync1+nbadsync2
|
||||
if( nbadsync .gt. 4 ) cycle
|
||||
|
||||
! this could be used to count the number of hard errors that were corrected
|
||||
hardword(1:48)=hardbits(9:9+47)
|
||||
hardword(49:128)=hardbits(65:65+80-1)
|
||||
unscrambledhardbits(1:127:2)=hardword(1:64)
|
||||
unscrambledhardbits(2:128:2)=hardword(65:128)
|
||||
|
||||
! normalize the softsymbols before submitting to decoder
|
||||
sav=sum(softbits)/144
|
||||
s2av=sum(softbits*softbits)/144
|
||||
ssig=sqrt(s2av-sav*sav)
|
||||
softbits=softbits/ssig
|
||||
|
||||
sigma=0.65
|
||||
lratio(1:48)=softbits(9:9+47)
|
||||
lratio(49:128)=softbits(65:65+80-1)
|
||||
lratio=exp(2.0*lratio/(sigma*sigma))
|
||||
|
||||
unscrambledsoftbits(1:127:2)=lratio(1:64)
|
||||
unscrambledsoftbits(2:128:2)=lratio(65:128)
|
||||
|
||||
max_iterations=20
|
||||
max_dither=50
|
||||
call ldpc_decode(unscrambledsoftbits, decoded, max_iterations, niterations, max_dither, ndither)
|
||||
|
||||
if( niterations .ge. 0.0 ) then
|
||||
goto 778
|
||||
endif
|
||||
|
||||
enddo
|
||||
enddo
|
||||
enddo
|
||||
|
||||
msgreceived=' '
|
||||
phase0=-98
|
||||
i1hashdec=0
|
||||
goto 999
|
||||
|
||||
778 continue
|
||||
! The decoder found a codeword - compare decoded hash with calculated
|
||||
! Collapse 80 decoded bits to 10 bytes. Bytes 1-9 are the message, byte 10 is the hash
|
||||
do ibyte=1,10
|
||||
itmp=0
|
||||
do ibit=1,8
|
||||
itmp=ishft(itmp,1)+iand(1,decoded((ibyte-1)*8+ibit))
|
||||
enddo
|
||||
i1Dec8BitBytes(ibyte)=itmp
|
||||
enddo
|
||||
|
||||
! Calculate the hash using the first 9 bytes.
|
||||
ihashdec=nhash(c_loc(i1Dec8BitBytes),int(9,c_size_t),146)
|
||||
ihashdec=2*iand(ihashdec,255)
|
||||
|
||||
! Compare calculated hash with received byte 10 - if they agree, keep the message.
|
||||
i1hashdec=ihashdec
|
||||
|
||||
if( i1hashdec .eq. i1Dec8BitBytes(10) ) then
|
||||
! Good hash --- unpack 72-bit message
|
||||
do ibyte=1,12
|
||||
itmp=0
|
||||
do ibit=1,6
|
||||
itmp=ishft(itmp,1)+iand(1,decoded((ibyte-1)*6+ibit))
|
||||
enddo
|
||||
i4Dec6BitWords(ibyte)=itmp
|
||||
enddo
|
||||
call unpackmsg(i4Dec6BitWords,msgreceived)
|
||||
else
|
||||
msgreceived=' '
|
||||
phase0=-99
|
||||
endif
|
||||
|
||||
999 continue
|
||||
! write(78,1001) nutc,t0,iav,ipk,is,fdiff,fest,ffin,nbadsync1,nbadsync2, &
|
||||
! phase0,niterations,ndither,i1hashdec,i1Dec8BitBytes(10),msgreceived
|
||||
!1001 format(i6,f8.2,i4,i4,i4,f8.2,f8.2,f8.2,i4,i4,f8.2,i4,i4,i4,i4,2x,a22)
|
||||
|
||||
return
|
||||
end subroutine syncmsk144
|
||||
Loading…
Reference in New Issue
Block a user