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Fix typo in hspec. Minor tweaks to comments in msk40decodeframe.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7204 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke 2016-10-19 20:31:18 +00:00
parent 49b7ac8937
commit fde606a912
2 changed files with 10 additions and 16 deletions
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2
lib/hspec.f90
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@ -80,7 +80,7 @@ subroutine hspec(id2,k,nutc0,ntrpdepth,nrxfreq,ntol,bmsk144,ingain, &
tt1=sum(float(abs(id2(k0:k0+3583))))
k0=k-3584
tt2=sum(float(abs(id2(k0:k0+3583))))
if(tt.ne.0.0 .and. tt2.ne.0) then
if(tt1.ne.0.0 .and. tt2.ne.0) then
call mskrtd(id2(k-7168+1:k),nutc0,tsec,ntol,nrxfreq,ndepth, &
mycall,hiscall,bshmsg,line1)
endif

16
lib/msk40decodeframe.f90
View File

@ -11,7 +11,6 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
integer*1 cw(32)
integer*1 decoded(16)
integer s8r(8),hardbits(40)
! integer nhashes(0:15)
real*8 dt, fs, pi, twopi
real cbi(42),cbq(42)
real pp(12)
@ -53,14 +52,10 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
endif
if(mycall.ne.mycall0 .or. hiscall.ne.hiscall0) then
! do i=0,15
! hashmsg=trim(mycall)//' '//trim(hiscall)//' '//rpt(i)
hashmsg=trim(mycall)//' '//trim(hiscall)
call fmtmsg(hashmsg,iz)
call hash(hashmsg,22,ihash)
ihash=iand(ihash,4095)
! nhashes(i)=iand(ihash,4095)
! enddo
mycall0=mycall
hiscall0=hiscall
endif
@ -76,7 +71,7 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
cfac=cmplx(cos(phase0),sin(phase0))
c=c*conjg(cfac)
! matched filter -
! Matched filter.
softbits(1)=sum(imag(c(1:6))*pp(7:12))+sum(imag(c(NSPM-5:NSPM))*pp(1:6))
softbits(2)=sum(real(c(1:12))*pp)
do i=2,20
@ -84,8 +79,8 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
softbits(2*i)=sum(real(c(7+(i-1)*12-6:7+(i-1)*12+5))*pp)
enddo
! sync word hard error weight is used as a discriminator for
! frames that have reasonable probability of decoding
! Sync word hard error weight is used to reject frames that
! are unlikely to decode.
hardbits=0
do i=1,40
if( softbits(i) .ge. 0.0 ) then
@ -98,7 +93,7 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
return
endif
! normalize the softsymbols before submitting to decoder
! Normalize the softsymbols before submitting to decoder.
sav=sum(softbits)/40
s2av=sum(softbits*softbits)/40
ssig=sqrt(s2av-sav*sav)
@ -129,8 +124,7 @@ subroutine msk40decodeframe(c,mycall,hiscall,xsnr,msgreceived,nsuccess)
enddo
nrxrpt=iand(imsg,15)
nrxhash=(imsg-nrxrpt)/16
!write(*,*) 'decodeframe ',nhammd,cord,nrxhash,nrxrpt,ihash
! if(nhammd.le.5 .and. cord .lt. 1.7 .and. nrxhash.eq.nhashes(nrxrpt)) then
!write(*,*) 'decodeframe ',nhammd,cord,nrxhash,nrxrpt,ihash,xsnr,sigma
if(nhammd.le.5 .and. cord .lt. 1.7 .and. nrxhash.eq.ihash) then
nsuccess=1
write(msgreceived,'(a1,a,1x,a,a1,1x,a4)') "<",trim(mycall), &