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Tweaking msk32 decoder.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6875 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke 2016-07-06 01:28:01 +00:00
parent d987f8c507
commit 73c5fef39b
1 changed files with 9 additions and 8 deletions
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17
lib/detectmsk32.f90
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@ -108,7 +108,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
likelymessages(irpt)=ig
! write(*,*) hashmsg,ig,ig24(ig)
enddo
qsocontext=.true.
qsocontext=.false.
! fill the detmet, detferr arrays
nstepsize=48 ! 4ms steps
@ -225,7 +225,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
ddr=abs(ccr1)*abs(ccr2)
crmax=maxval(abs(ccr))
! Find 3 largest peaks
! Find 6 largest peaks
do ipk=1,6
iloc=maxloc(abs(ccr))
ic1=iloc(1)
@ -235,7 +235,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
ccr(max(1,ic1-7):min(NPTS-32*6-41,ic1+7))=0.0
enddo
do ipk=1,6
do ipk=1,2
! we want ic to be the index of the first sample of the frame
ic0=ipeaks(ipk)
@ -279,7 +279,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
! Final estimate of the carrier frequency - returned to the calling program
fest=1500+ferr+ferr2
do idf=0,10 ! frequency jitter
do idf=0,6 ! frequency jitter
if( idf .eq. 0 ) then
deltaf=0.0
elseif( mod(idf,2) .eq. 0 ) then
@ -294,7 +294,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
! place the beginning of frame at index NSPM+1
cdat2=cshift(cdat2,ic-(NSPM+1))
do iav=1,8 ! Hopefully we can eliminate some of these after looking at more examples
do iav=1,8 ! Frame averaging patterns
if( iav .eq. 1 ) then
c=cdat2(NSPM+1:2*NSPM)
elseif( iav .eq. 2 ) then
@ -397,7 +397,8 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
iloc=minloc(cd)
imsg2=iloc(1)-1
cdrat=cdm2/(cdm+0.001)
if( cdrat .gt. cdratbest ) then
! if( cdrat .gt. cdratbest ) then
if( cdm .lt. cdbest ) then
cdratbest = cdrat
cdbest = cdm
imsgbest = imsg
@ -407,7 +408,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
idfbest = idf
idbest = id
nbadsyncbest = nbadsync
if( ( ihammd(imsgbest)+nbadsyncbest .le. 5 ) .and. ( (cdratbest .gt. 1000.0) .or. (cdbest .eq. 0.0) ) ) goto 999
if( ( ihammd(imsgbest)+nbadsyncbest .le. 4 ) .and. ( (cdratbest .gt. 100.0) .and. (cdbest .le. 0.05) ) ) goto 999
endif
enddo ! frame averaging loop
@ -423,7 +424,7 @@ subroutine detectmsk32(cbig,n,lines,nmessages,nutc)
enddo
999 continue
if( imsgbest .ge. 0 ) then
if(ihammd(imsgbest)+nbadsyncbest .le. 5) then
if( ( ihammd(imsgbest)+nbadsyncbest .le. 4 ) .and. ( (cdratbest .gt. 50.0) .and. (cdbest .le. 0.05) ) ) then
if( qsocontext ) then
nrxrpt=iand(likelymessages(imsgbest),31)
nrxhash=(likelymessages(imsgbest)-nrxrpt)/32