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Start work on Q65 wideband decoding.

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This commit is contained in:
Joe Taylor 2021-05-06 14:56:05 -04:00
parent 5f439126ee
commit 98f6181f32
1 changed files with 31 additions and 5 deletions
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36
map65/libm65/wideband_sync.f90
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@ -7,7 +7,7 @@ module wideband_sync
contains
subroutine wb_sync(ss,savg)
subroutine wb_sync(ss,savg,ntone_spacing)
! Compute "orange sync curve" using the Q65 sync pattern
@ -15,6 +15,8 @@ subroutine wb_sync(ss,savg)
real ss(4,322,NFFT)
real savg(4,NFFT)
logical first
character*1 c1
! integer hist(0:20)
integer isync0(22)
! Q65 sync symbols
data isync0/1,9,12,13,15,22,23,26,27,33,35,38,46,50,55,60,62,66,69,74,76,85/
@ -60,12 +62,36 @@ subroutine wb_sync(ss,savg)
sync_dat(i,2)=ccfmax
sync_dat(i,3)=xdt
sync_dat(i,4)=ipolbest
! f0=0.001*i*df
! write(70,3010) f0,sync_dat(i,2:3),nint(sync_dat(i,4)),0.001*i*df,nkhz_center
!3010 format(3f10.3,i5,f10.3,i5)
enddo
call pctile(sync_dat(ia:ib,2),ib-ia+1,50,base)
sync_dat(ia:ib,2)=sync_dat(ia:ib,2)/base
! hist=0
! s2_avg=63.5*ntone_spacing
! do i=ia,ib
! f0=0.001*i*df
! write(70,3010) f0,sync_dat(i,2:3),nint(sync_dat(i,4)), &
! 0.001*i*df,nkhz_center
!3010 format(3f10.3,i5,f10.3,i5)
! x=min(sync_dat(i,2),20.0)
! nx=x
! hist(nx)=hist(nx)+1
! if(x.gt.2.5) then
! c1=' '
! s0=sync_dat(i,2) - 1.0
! s1=(sync_dat(i-1,2) + sync_dat(i+1,2) - 2.0)/s0
! s2=(sum(sync_dat(i+ntone_spacing/2+1:i+64*ntone_spacing,2)) - s2_avg)/s0
! if(s2.ge.0.5) c1='*'
! write(72,3072) f0,s0,s1,s2,c1
!3072 format(f12.6,3f10.3,2x,a1)
! endif
! enddo
! do i=0,20
! write(71,3071) i,hist(i)
!3071 format(i2,i8)
! enddo
return
end subroutine wb_sync